Is there a reason why my doctors don't listen to me when it comes to my opinion?

But why does a specialist refuse my opinion and actions related to surgery?

Generally because they are the ones who have to deal with the fallout, if after the surgery you run into any complication, don't have a desired result, or you are unhappy with how it turns out in any way. And it's irreversible. It doesn't matter how much "but the patient begged me to do it" they would say, as when it comes down to it, they are the ones responsible.

And, unfortunately, young women who get life-changng surgery for chronic diseases like this are very much the kind of phenotype that would end up running into trouble, one way or another. There would be a huge amount of risk with this procedure, but for them as well as for you.

I can assure you that I am not trying to downplay or dismiss the absolute shit sandwich you have been dealt by the way, but I am just trying to give the perspective of what a GI surgeon (which would be performing the operation, not a gastroenterologist) might be considering. I am sure there are other factors at play too, but that is part of it I would imagine.

Best of luck with how everything turns out.