To add additional context to my other reply, I do not find this question rude, but I do get frustrated with people who seem to think our food problem is easy to solve.
My wife and I have agonized for most of our daughter's life about feeding her. She has autism and ADHD, and will often forget to eat if we do not work hard to get her to eat. If she eats a food whose textures, smell, or taste trigger her, she will vomit immediately. She hates to vomit, and will refuse to eat ANYTHING after this happens (even her comfort foods). She doesn't want to be around food at all at that point.
She is very small for her age and underweight (we have routine consultations with her endocrinologist on her growth, and have had countless conversations on whether we should start growth hormones with her. There are so many things to consider around that decision, it has been quite a challenge).
We have a dietician that we consult with regularly, both about her eating and her growth. She, along with both our endocrinologist and pediatrician, feel that getting her calories is the most important thing, and that we can sacrifice quality for quantity, because even when she has freedom to eat whatever junk she wants, she has trouble eating enough. Both the dietician and her therapist think it is very important we never turn food into a battle, since she already has so many issues around eating that we don't want to make it worse.
I appreciate your question being in good faith, but I do get frustrated when people make comments about my daughter's diet, as if we haven't agonized over this for the 8 years of her life. This is something we deal with every day, and I find it both frustrating and amusing when people think they can solve the problem in a single internet comment.
Things that work for some kids don't work for all kids.