Maybe Democrats would never vote for this, but that's kind of the problem.
I'm curious: Where does your line of thought actually end? Do you agree that they should perhaps meet Republicans in the center around vaccine issues and dismantle vaccine requirements? What about issues of climate change? Corruption?
It might sound unsavory to say that they should drop <issue you think is important>, like climate change, but if that were genuinely the reason they're losing then of course they should drop it. The alternative is you just have a party of ideologues with no power. They can still do good things without doing <important thing>.
I just don't think any issue is as contentious as abortion, or having as much of an effect, because you can hold your nose about a lot of things, but not about 'murdering babies'. Again, this is a moral hard line that a lot of people have. They seriously think that Democrats are ontologically evil because of this; it's far beyond the political. I don't think they need to drop those things you listed from the platform because I don't think it would help them win.
From talking with Republican or centrist or ex-democrat peers and family, some of them would vote Democrat "if they stop killing babies", and others would "if they stopped the racial shit". I've never heard anyone say such a thing about anything you listed.
Anyone saying this in 2026-2028 is going to be eviscerated by democrats. The bridge was long burned and now they are throwing citizens into the burning wreck. You don't "bridge the aisle" with people who threaten your life.
Also, anyone who wants to protect kids but isn't pushing the Epstein files to be released spoke wide and loud on what they really care about. So many motte and baileys out there.