There is something very pretentious and 'worldly' about sweet taste

That is an interesting theory. I feel almost the opposite.

I always think of sweet flavors as the most immature, least sophisticated. it's not an acquired taste, it's something that humans instinctively like from childhood. Evolution gave us a sweet tooth because fruits are at their sweetest when they are ripe, but unripe fruits can often make you ill. Plus, sugar is a basic nutrient for energy, so people will often eat more of it than they should.
Salt is also a necessary nutrient that was scarce in many places, which is why we have an inborn preference for it and often will eat too much. (in cave man times, it was scarce enough that there was no risk in getting too much).
Even most animals will eat sweet and salty things.

Flavors like hot/spicy, sour, fermented foods, pickled foods, bitter tastes, those are all acquired tastes that aren't instinctive. Usually little kids and animals will not like those things. So they seem more wordily and sophisticated to me. They are the furthest from basic natural instinct and more of a human cultural learned preference.