Yeah, I don't disagree with most of that.
But from Pelosi's perspective, ignoring the big corporate money for a second, she's probably concerned with pragmatism. She's knows how much time had to be put in to build the relationships and institutional knowledge to actually get shit done. AOC comes of as destructive and full of vague, grandiose ideas which isn't necessarily going to benefit the sustainability of the party or even AOC's stated agenda because you need to maintain a majority to get anything done. The progressive wing isn't overly popular among the democratic base, either.
54% of democrats want their party to be less liberal. Among 'liberal democrats' (which is now a very slight majority), only 69% want the party more liberal.
Despite how much the electorate has moved in the progressive direction on at least some issues since the last election cycle, grabby Biden hasn't even announced he's running and he's in the lead.