Decades ago, the parties were much different than today. There were pro-choice Republicans and pro-life Democrats. Only one time in recent (2000+) memory did the Dems ever have the 60 votes necessary for codifying Roe. They used that two-ish week window to pass the ACA.
And that’s not even touching on the differing public approval of abortion.
No revisionist history. Pelosi refused to bring it to the floor because she didn’t have the votes. There’s lots of stuff to criticize her on, but whipping and vote counting aren’t that.