I know I'm relatively new to this process and the forum (haven't had surgery yet), but I really do appreciate the OP's post. I was supposed to have surgery next week, but I postponed it until December for many of the reasons the OP discussed. I have been "practicing" eating how I would after surgery for the last month and a half, and it is honestly a nightmare compared to how I used to eat. I have to relearn everything, and am finding it wildly restrictive in eating and drinking times with my crazy busy work schedule, and having a very hard time getting fluids in, etc... I realized a week ago that I am completely unprepared for surgery at this point and the lifestyle change it brings, which is why I pushed it back to Dec.
If I had done the surgery next week without all the intensive "practice" I am doing now, the OPs post may very well have been mine instead of this reply. What my dietitian, and surgeon, and psyche eval all told/taught me up to this point is nothing compared to actually eating and drinking in the way they are describing. I have decades of eating and drinking habits to undo. Thankfully I did give it a full practice run for 1+ months to know how hard it is (for me and my schedule anyway, maybe others find it easier). I think the OP is in a similar place, but didn't do the "practice" eating and drinking before hand, and I absolutely understand much of what he/she is upset about.
They might be a troll, but that initial post has stuck with me for a week since I read it, and I very much relate to the difficulties they are describing, and wish them the best in their journey.