The appeal for nostalgia in 5e ensured that many of the settings 5e pushed would include Halflings. This is because these settings where old and most of the old settings had fewer race options but almost always included humans, dwarf, elf, and halfling.I'm sure that somehow made sense to you, but I certainly am not following you here...
However that same appeal to nostalgia in 5e ensured that old setting lore where halflings are a background race with fewer setting entanglements.
I know 2 of them didn't.And perhaps that's what they like? What's wrong with that? You're perfectly free to make the sort of setting you like.
One assumed you just had to include dwarves, halflings, and elves because they were D&D.
One aspired to make a setting worth selling and forced halflings because they were popular with some fans. He set up a halfling village and did nothing with them. His halflings don't even have their own god(ess).