For some of their more conservative members, they’ve certainly done so in the past, but I’m pretty sure that @SeattleRain is just talking about the self-defeating obsession that Democrats have with appearing non-partisan. Yes, they do need to compromise to an extent to get something through the house at the moment, but they have essentially self-sabotaged in the past when they had the majorities to not need to do so, yet insist on negotiating with the Republicans anyway because they hope moderate Republicans will give them credit for not ramming legislation through in a one-sided fashion.
This really only works when the other party is engaging in negotiations in good faith, which the Republicans do not. As a result, the Democrats give the GOP initiative on steering bills and policies as they like, winding up with compromised legislation that doesn’t please their actual base, while also not getting credit from the Republicans they’re hoping to sway in some sense.
For an easy example of this, look at talks about eliminating the filibuster earlier in Biden’s presidency. Manchin and Sinema made it a dead idea, but even before that, Biden has been opposed because of his obsession with reaching across the aisle in an age where trying to do so only serves to stop his agenda dead in its tracks. Rather than get their elbows out and bully the two hold outs into falling in line (which was supposed to be what Manchin was good for, at least. I kept hearing, “He disrupts things, but he falls in line when it counts,” but pretty much never saw evidence of this), they just shrugged and collectively let the agenda die or get neutered, because to do otherwise would not be bipartisan.