This is likely because the consistency is somewhat like the consistency of vomit.

I like oatmeal (or porridge as it’s called here), but I can understand why people wouldn’t.

I love the taste of oatmeal in milk but can't stand the texture. The way I eat is very slowly with a small spoon. Since COVID, I've been eating milk+oatmeal every day (powder milk and oatmeal have almost infinite life) so I definitely got better at eating it. But I still can't stand putting a big spoonful of it in my mouth, even though I love the taste and smell!

I don't think I'll ever look at oatmeal the same now :/