If Mounjaro etc were healthy harm reduction tips like eating plenty of high-quality protein would not been needed.
Maybe I am misunderstanding this (what do you mean by harm reduction techniques?) but if not it's pretty ignorant. Mounjaro causes weight loss. One of the potential problems with any kind of weight loss is loss of muscle. Protein is recommended for anyone losing weight, by any method, because along with strength training it helps prevent too much muscle loss. The idea is to keep the muscle and lose mostly fat, and you can't do that without adequate protein.
When I eat the way someone on Mounjaro eats it is dangerous and I need help. Either extreme restriction is dangerous or it's not. (It is, FYI) You can't have it both ways.
What do you mean, "the way someone on Mounjaro eats", which people? I'm someone on Mounjaro. Today I had a cheese and sweetcorn omelette for lunch followed by some yogurt with kiwi, and then a chicken, spinach and coconut curry for dinner followed by some cashew nuts and a bit of dark chocolate. It was all delicious. Which bit of that would be dangerous for you to the point where you would need help?
There are plenty of people talking about what they're eating on MJ on various threads. Very few are doing extreme restriction. The appetite suppression does kick in hard for some people at first and they struggle to eat enough, it happened to me, but it doesn't seem to last. What people are actually talking about is finding a way to eat that they can continue for life, and using MJ to learn new habits etc. And people are worried about losing too quickly because they think it increases the risk of gall bladder side effects, loose skin and regaining weight after they come off the meds.