Sure. Even terribly unworkable ideas count as ideas. But only a couple of democrats are willing to come out and publicly support it since they know it'll collapse under its own weight.

The same is true of the GOP, though. Their ideas are also unworkable. Many of them are very difficult for anyone outside the base of the party to advocate, just like Medicare for All is for Democrats. But most of them are difficult to get adopted because they simply won't work, so you can't get the last votes you need to put them in place. They work great as messaging proposals, but not as actual policy. That's because the stuff that can get implemented won't solve the problem (reducing medical costs that consumers pay); the stuff that would solve the problem can't get implemented (because it would require inflicting a lot of pain on a lot of constituencies).

Which is why I think your criticism of Democrats as not having ideas isn't really a fair one. Like the GOP, the Democrats have tons of policy ideas. But like the GOP, they have very few policy ideas that could get 60 votes in the Senate. Like the GOP, they have very few policy ideas that are supported uniformly (or near-uniformly) across all the factions of the party. And like the GOP, they have very few policy ideas that could meet the prior two criteria that aren't already in place - so a big part of what the Democrats are trying to do is preserve what works (in their opinion).