So, I don't think there's a good single answer to this question.
Obama isn't and wasn't as progressive as he was (and sometimes is, mostly by Republicans) framed. The democrats only had a filibuster-proof majority for a few months, and even then, Joe Lieberman gummed up the works big time on getting the ACA through. Somebody mentioned that they wasted a lot of time trying to get bipartisan support for the ACA, and it's true. They spent months negotiating against themselves with the republicans, whose answer was always "no", and by the time they were done, the ACA was a shell of what it could have been. After the ACA, which I must add is basically comprised of all the non-insane (read: mostly pointless) reforms the Republicans were proposing as well as some more rational reforms, the right-wing hype machine started red-lining (as in tachometers, not the racist housing policy, though I guess that could also work since they really didn't want that black man living in that house) and you'd have thought we had an actual communist overthrow of the government on our hands. The democrats absolutely bungled the PR (the more things change, the more they stay the same, huh) and pissed off everyone outside the party and made everyone inside the party facepalm. After the supermajority disappeared, the republicans started cynically abusing the filibuster and turned the rest of Obama's presidency into anything from a lame duck to just one (republican caused) crisis after another.
Tl;Dr a lot of the democrats aren't progressives, and we had a lot more of the old cold war blue dog crowd that Biden is from than we do now, mixed with absolutely bunglefucking both the political strategy and PR around the ACA and not being able to get past the filibuster once the supermajority disappeared.
P.S. it's worth noting that, at the time, Roe was considered settled law. From what I recall, nobody was too anxious about the SCOTUS citing 400 year old witch hunters and overturning pretty well settled and accepted case law. The republicans were generally seeking to overturn Roe via the federal legislature/executive at the time.