It really boggles the mind. Conservatives are single issue voters, and they show up so their shitty single issue gets a huge amount of attention from candidates.
Progressives are all-issue voters, meaning if a candidate doesn't support ALL of their issues then the progressive stays home. As a result, candidates pay attention to none of their issues and progress is slow.
Progressives also view voting as a moral issue, i.e. if you vote for Joe Biden you're literally committing genocide and all the bad stuff that happens while Biden is president is your fault. In the same breath they'll tell you how helping Trump get elected by suppressing the vote isn't their fault and somehow absolve themselves of the moral implications of a Trump presidency.
No one slows down progress as much as progressives.