I'm kind of picky about wine, don't like many of them, but some of the ones I like are cheap and others pricey, different wines taste very different from each other. This is a step up from liking none of them, before.
Coffee I tend to think the preparation matters more, but have certainly had bad coffee and good coffee.
Cheese you are just wrong on. There is quality, some cheese is made with xanthan gum and wishes and is not really cheese, or is so rubbery and flavorless it is bad. I do like so many different kinds, am not limited like with wine. But don't think it's reasonable to say that processed shreds or slices are "as good as" a real cultured milk cheese.
I do agree it's not a benefit to develop a palate to the point you loop back to being really picky like someone who just likes white bread and chicken tenders, and that it's better to enjoy more things.