This is a bit like saying a hangnail and a gangrenous amputation are "not equally bad but they are both very bad". One is literally chopping things off to permanently alter them. The other is, at times, uncomfortable and frustrating.
The false equivalence of doing the "both bad!" song and dance serves to so radically under-emphasize the absolute wanton, orders-of-magnitude-worse levels of corruption and evisceration of norms of one side by reducing it to "more bad than the other but they're both very bad." It allows the window to shift to normalize the sort of destruction of systems we're seeing by hand waving away how "the other guys aren't great, either!" It's borderline discourse malpractice at this point, and should be called out as such.
The enlightened centrist take is not entirely wrong, though. The left definitely has some blind spots, among them their purist dedication to perfect morals and a willingness to tell anyone who does not perfectly agree to piss off.
While the right is comfortable holding their nose when white supremacists hang around because it gets them a bigger coalition, the left will excommunicate someone for saying out loud that they think trans women are not exactly equivalent to biological women. This shrinking of the coalition is how we ended up enduring another Trump presidency.
Not to mention the complete fiasco that was the 2024 presidential race. We should have thrown out the entirety of DNC leadership several levels deep for letting that happen.
There’s a bit of a duality about perfect agreement within the voters for the party’s candidates and somewhat within the party membership itself. Yeah, there’s a lot of telling each other to piss off. There’s a lot of jockeying for the platform and the primaries. But come the general, it’s a minority of the voters who will sit it out or vote for a minor party. Sometimes it’s a large enough minority to hand things to the Republicans, though.
A massive problem in the US is that the completely broken two-party system has essentially killed the political spectrum. People more-or-less vote against the party they dislike more, not for the party they want. To see any form of change you need someone like Trump to completely take over a party in one go and kill the old one from inside.
From an outside perspective the US does not have a political left. The policies proposed by the Democrats are roughly in line with the mainstream right-wing parties in the rest of the world. A mainstream left-wing party would look an awful lot like someone like Bernie Sanders - and we all know the Democrats would rather platform a wet paper towel and lose than see him gain any kind of power!
