I think this (and other comments on this thread) completely misunderstands and minimises the impact of having a mastectomy. For many women it leads to significant psychological distress over a long period of time. The NHS funds reconstruction and psychological support for this reason but the results of reconstruction are usually nothing like having a boob job and it will usually be obvious you have had cancer. It’s not about embarrassment and is not remotely comparable to being a bit overweight or having wrinkles. It’s the loss of a body part and deeply tied up with the experience of having cancer.
The idea of strangers seeing my “reconstructed” breast makes me feel panicky and at this point in time there is no way that I would feel liberated or similar as a result. I know that it would be unhelpful to my recovery so wouldn’t put myself in that situation. And I had pretty good mental health and body image before cancer and was in no way prudish.
It’s very individual and there are, of course, plenty of women who are or become proud of or antipathetic to their mastectomy scars and wouldn’t be phased by this situation. I’ve no idea where OP is on that spectrum.
I can believe that people wouldn’t stare but I do think they would notice, draw the conclusion I’ve had a mastectomy and therefore breast cancer and maybe come to some judgement about it, even if a positive one. It is unusual to see that in a relatively young woman and breast reconstruction results can be quite jarring if you haven’t seen them before. A pp talked about it being an icebreaker between women- again I absolutely wouldn’t want to discuss my previous diagnosis and treatment with someone in a spa while on holiday.
Of course, people who have visible disabilities have to deal with people noticing and potentially commenting all the time but I don’t have experience of that and don’t generally need to reveal that I’ve had cancer.
In five years time I might feel differently but you just can’t say that this would universally be a good experience for a breast cancer survivor.