That is based on studies which studied the effects of protein intake for resistance training athletes.

High protein diets promoting muscle growth and reducing muscle mass is true for anyone training, not just legitimate athletes. Doctors should be advising resistance training anyways

The observed effect is nearly statistically insiginificant or of mild effect in almost every of those

That is just not true. Research has shown consistently that high protein diets while resistance training reduces the loss of lean body mass by a not insignificant, amount, and that high protein promotes muscle gain. The direction by doctors towards patients should be with the intent that they are also strength training.

The reason for its working pathway is the idea that the body will prefer to consume the intake protein over the myofibril dissassembly.

This has more to do with ingesting your protein timing, which, yea, is relatively insignificant, or if you are already ingesting a decent amount and not training. It has less to do with a difference in the total amount of protein in a day in an individual who is strength training.

Yet, that makes entirely sense with normal people who still have a normal food intake. Who are struggling to retain a deficit of 200-500kcal daily. Not the least, because protein suppresses ghrelin longer than carbs not he least also cause of the lack of insulin impact.

This has nothing to do with what I'm referring too.

And then especially for those in a deficit plus doing resistance training or any other athletic activity. To increase protein makes sense, as you are actively destroying and rebuilding what that material is used for.

This should be the case with these medications, regardless. I also think you misunderstand the process of building muscle, as destroying is not necessary for any sort muscle gain.

People on semaglutides do not belong in this group per se. The majority are not in a healthy deficit, they literally starve for weeks in a row, heavily.

That's a separate issue, but is largely reflected in the larger crash diet culture of losing as much weight, as quick as possible. I think many see the quick effects from their initial adjustment to the medication and then "lean into it" per se, but that is more anecdotal.

The easier way is simply to EAT MORE CARBS instead of adding a "normal" diet advices on top of a drug which kills your whole hunger.

People on semglutides do not require to further reduce their calory intake with normal diets, because their hunger function is entirely switched off. So, advicing them to eat more protein.

I'm not of the opinion that carbs are bad, or anything like that, to start, I just want to make that clear. If the people on these medications, assuming they are prescribed to an obese or morbidly obese person, hasn't changed their eating habits to begin with, chances are they are already on a high carb and fat diet. Usually the high protein comments in this situation are geared towards people who think they can eat junk food guilt free because the medication will make them full and stop before they get anywhere close to overeating. Your body still needs a base minimum of protein, which is the point, and you need for just basic bodily functions. In addition, if they are at an overly extreme deficit, higher fat protein sources would assist upping the calorie intake, as it is relatively calorie dense.

They won't experience much atrophy with a healthy deficit. It is just because they literally starve themselves into survival mode.

There are a few problems with this. You can still have muscle atrophy on a "healthy" deficit. If you healthy deficit from a 300 lb sedentary individual to a 200 lb sedentary individual, you will lose muscle to be proportional to someone who is a 200 lb sedentary. Any notion otherwise is just nonsensical, and depending on height, there is a solid chance the would still have a high body fat percentage. With strength training their is a reductiom in the muscle loss, and even if still losing total body mass at the same rate, the reduction in lean body mass loss mean losing a larger amount of body fat. This effect is greater with a high protein diet and in newcomers to resistance training, who can even gain muscle with strength training. Higher muscle mass also promotes a higher TDEE, making it easier to maintain the weight loss in the long term.

Also, define what you are referring to be "survival mode" as colloquial usage of that in this context is wrong, and I'm not sure if it's what you meant or not.