If you can cite actual evidence to backup anything you've said then sure, I'd consider it more in my own arguments.
Ketogenic diet has very noticeable health benefits and where you won't easily be nutrient deficient. Veganism in contrast you hear stories regularly that over time some people develop health issues - is it because of the diet or something else underlying - we don't know, no one's studied it properly.
The growing counterpoint to veganism - a lot of which are people doing it for ideological reasons - from my observation is to counter the growing hate and intolerance against people who eat animals. Hunting and eating animals is a natural part of our evolution and to deny that is denying evolution; only psychopaths don't care about causing unnecessary suffering, everyone else would rather abolish factory farming where abuse is ripe and extreme. The carnivore diet is starting to trend, animal-only diet, and badly done research painting meat in a bad light is being debunked.
The place where there's no profit to be made, regarding rapid, healthy weight loss - which is water fasting; there's no profit motive to promote water fasting in the mainstream. Otherwise if there is profit to be made, and bad actors involved, then there will be propaganda being generated - and it will be the crowd who spread the content they produce, that content which doesn't cost a lot to produce - and is free to distribute especially when you design the results, the writing, to align with beliefs of members of a group.