Only 12% of the general public would describe themselves as “progressive,” but most people seem to be unsure what it means so that’s better that the term “liberal.” Liberals ruined the term “liberal” (which was a good term; I think “classical liberal” describes my politics better than “conservative”) by getting it associated with their arrogant, douchey politics so that “liberal” now means to most people “utterly useless idiot who thinks he’s smart and should force his ideas on everyone else,” so they tried to shed that term for a new one — “progressive” — and are slowly corroding its meaning too until eventually it will be toxic as well. Conservatives, on the other hand, took a term that wasn’t that great (why would you want to be a conservative when currently the status quo sucks?) and made it good by association. Now “conservative” just means to most Americans “someone with common sense.”
So next time instead of liberals taking an actual word people might want to use for other purposes and corrupting it, maybe they can just call themselves a completely made up term instead. Like “muckadoo” or something. That would be considerate of them, but then considerate of the population at large isn’t very progressive.