I agree with others that the idea of "living as a woman" is fraught. However, I do think it can be understood in a way that is coherent. We are social beings and in some ways who we are as social beings comes from how we are reflected on others. If we are an important elder in the community, we are treated differently than a child, and there are a number of things wrapped up in that - our age and generation (which is objective,) but also how other perceive and relate to us, and then also how we internalize that recognition and reflect it back.
So I understand "living as a woman" in this context to mean superficially taking on certain social markers conventionally associated with women, having others relate to us as if that were so, and internalizing that social "recognition".
I am tbh on the fence about this in a few ways, even in "legitimate" cases of dysphoria. I do not think it's possible to do this very convincingly while maintaining important sex distinctions, so I am skeptical of how useful it could be. But I also think it may ask too much of others. That being said, it is something that probably could be managed well enough for some, on a very limited basis, if they were carefully vetted people. Not including things like access to sex segregated spaces though.
I also am somewhat skeptical about the idea that everyone can dress how they feel most comfortable because that is ok. Clearly, to me, none of us do that. Even rock stars are out to break the boundaries are limited, they have to think about what they wear all the time! We all have to learn, as adults, that we sometimes have to wear things we don't love, and the thing is, it doesn't really matter, because they are just clothes. There will always be some kinds of "gender" conventions and in some roles breaking convention is not appropriate, and I don't think anyone needs to do so to be who they really are.
But my main issues are around the medical side. I think there is zero evidence that what is called "trans" in adults is much to do with kids, and I think most of what we see in kids is iatrogenic. I think the evidence that transition in adults is ever medically helpful is very poor. And I don't think adults are allowed to do whatever they want to modify their bodies, unless they do it themselves. Doctors are limited to (should be limited to) medical procedures that have a health benefit, it's part of their professional ethics. And IMO many common cosmetic surgeries don't make the grade, they offer only risk with no legitimate medical purpose.
I also don't think men with AGP should be given any help to transition. I have real sympathy for people with weird sexual fixations, more than a lot of people do. But I think indulging them is about the worst thing we can do for those people. It's not kind, at all, we are making their lives worse in the long term in many cases.