Well, by definition in these cases it's making a correct decision but that decision isn't popular. If red-lining wasn't profitable the banks would have gone broke and we wouldn't be talking about it.

The models aren't wrong, or even wrongly biased. We're systematically failing to ask the right questions because it's not politically correct to even call out the issues we're trying to combat. If you're trying to achieve "equity" then you need to define it and represent it in your equations, not ban various metrics until justice happens.