I grow fruit trees and lots of tomatoes. Yes, there is a push for sweeter fruit. Measured as brix.

Tomatoes. Sungold is very sweet, Peach is the least sweet of the varieties I have tasted.Green Envy is a surprize: rather bitter until truly ripe, then a hint of richness and moderately sweet.

My son picks the sungold for his lunches. No other.

Apples. The most popular are the very sweet, like Yellow Delicious and its offspring; and the number one apple Honey crisp.
Kingston Black is a bitter sharp and used in cider making, otherwise not edible.

Generally, we humans have bred out bitterness, and increased the brix.

Im not a professional, still learning....

We like sweet, and sweet sells.