I suspect I'm going to seriously regret posting here but here goes. I'm a trans man who has been treated for a gynaecological cancer. I found support during treatment from OUTPatients, the LGBTQ+ cancer charity that produced this leaflet with Macmillan. OUTpatients speaks to and supports trans cancer patients daily, and this leaflet was produced with input and feedback from this patient group, including myself actually - I was part of a focus group pulled together to contribute stories which informed the content. I mention this because I think it's important to understand this content wasn't pulled out of thin air, it was produced based on the real experiences, fears, concerns and challenges of real trans cancer patients. If the content of the leaflet doesn't speak to you, I can only echo what other posters have said here - it isn't about you.
The part about the removing body parts being ultimately affirming accurately describes the experience for some trans people. Of course a trans man is going to feel differently about having a mastectomy or hysterectomy than a cis woman might (though not all cis women are going to feel exactly the same about it either). It is not hurtful or offensive for someone to experience something differently to you.
Personally, I had a hysterectomy due to my cancer. My feelings about it are ambivalent - it certainly wasn't a walk in the park to go through the healing and hormonal upheaval. But actually it has made my transition onto testosterone smoother & it's very nice to never have to worry about periods or contraception ever again. It was my surgery and my experience and I'm entitled to feel about it the way that I feel. This takes nothing away from anyone else who had a different experience.
I don't know what "reality" OP thinks is being denied. Trans people really exist and we really get cancer, and it should be obvious to anyone with even the barest shred of empathy that while of course a cancer diagnosis is challenging for anyone, trans people might face some particular challenges in navigating treatment.
The leaflet at no point says anything false or misleading about who has what body parts or what the implications of that will be for treatment. And I can attest first hand that the vast majority of NHS staff proved perfectly capable of both talking to me about what was going on with my body in accurate medical terms AND respecting my trans identity. Nobody lied or denied reality, and to be honest I think the "denial of reality" here comes from posters who won't recognise trans cancer patients exist or think it's some kind of "fresh hell" to offer them tailored support. I am struggling to fathom the lack of empathy, to be honest. A cancer diagnosis is already terrifying and isolating enough, already strips so much from you, and you'd wish to make it even harder? I can't tell you how isolated I felt for so long before I discovered OUTPatients, or what a difference it made to me to speak to other trans cancer patients.
I want to say the NHS staff and particularly the nurses were wonderful - even though it was clear how busy and shortstaffed they perpetually were, they were so obviously absolutely committed to person-centred patient care that I'm honestly offended on their behalf at the suggestion that any of them would willingly do anything to any patient, trans or otherwise, that would make them feel uncomfortable or disrespected. It would be antithetical to them. I will never forget the chemo nurse who was so busy but still took a moment to sit quietly with me when I was overwhelmed with the pain from vein burn. Or another nurse on the chemo ward who was chatting to us about her evening plans but when no one came to replace her when her shift ended, she simply stayed without a word of complaint until everyone's treatment was done.
I only met one exception - when I was recovering on the ward post-surgery there was one nurse who was inexplicably horrible, she stormed into my room like I'd personally wronged her, wouldn't make eye contact with me at all, ignored me when I greeted her and tried to make small talk with her, and talked about me over my head to her colleague rather than speak to me. She then proceeded to make an error with my care that left me in pain for several hours. I would like to charitably assume she was just a shit nurse who was equally rude and careless with all her patients, but she was also the only nurse I encountered who was openly gender critical, so it's hard not to draw the conclusion that her hostile behaviour towards me was because I was trans. Whatever you think of trans people, I hope no one here thinks they deserve to be treated like shit while recovering from major surgery just because of who they are. And if that's what "reality based" care entails it only emphasises the need for trans-informed information and support from other sources.