You know our family is not the slightest bit fussy, everyone ate what is put in front of them. I confess I was rather sneery about the faddy people.
Then when she was 16 DD1 developed agonising stomach pain. She would bloat up until she looked about 9 months pregnant. She lost a lot of weight (and she was already slim) because food made her stomach hurt. She had lots of medical investigations but the basic outcome was, "We can't find anything with a name so we'll call it IBS."
So in the years since then we have worked out her triggers: lactose, cheap bread, oranges, fruit juice, lots of random things. And now she has her life back.
A couple of years on and DS1 (19), developed chronic life disrupting diarrhoea. Not very pleasant when you are a busy student. Very fortunately, a short stay at home and an accidental swap to DD's lactofree milk revealed the problem quite quickly. DS is lactose intolerant, he is the annoying guy who gets fussy in the pizza place.
Anyhow, discussing our two "faddy" kids, DH commented that having pain and bowel urgency was pretty much a way of life for him. He has switched to lactofree milk too and is miraculously better.
Everyone in my family occasionally falls off the wagon though, especially when presented with something delicious. Doesn't mean they don't pay the price.
Thing is, lots of people put up with general discomfort because they have never known any difference. Lots of people suddenly develope quite severe intolerances. IBS is very common, and often runs in families. So beware OP, there is a good chance this will come back to bite you on the bum.