One might argue your job is to do what’s best for the child despite your beliefs.

That's what I meant with pretend. What's best boils down to my beliefs, there is no objective criteria.

the risks are lower for vegetarians

No, there are simply no risks in not eating meat. There are risks in eating only potatos, but there's just as much in eating only bacon. The potential risks in vegetarian and carnivore diet come from not enough diversity. But take a "normal Western" diverse diet, strip out the meat, and you're perfectly fine in all macro- and micronutrients.

I'm not OP of this subthread btw. Nobody ever came at me for my children's diet. Which they honestly should, as we eat way to much pasta, but that's what's always accepted 😅