Price aggregators like Google Flights continue to show the crappy tier by default, which means that airlines have to offer that tier to appear competitive. No idea why Google wants to build its product this way, but there are only a few companies in this business.

One of the fundamental truths of American aviation is a significant fraction of fliers will buy the cheapest ticket every time. They’ll bitch about it. But if you cut some leg room and a few dollars off your tag, you’ll swing them from another.

Basic economy doesn’t exist because of Google Flights. It exists because it sells. Well enough that it sustained entire discount airline fleets until the majors copied their model.