Comment by abound

For a bit more color here: a B Corp designation really is just a marketing tool. Unlike the name implies, it's not some special corporate structure, it's just a certification you pay some company to get and pinky promise that you'll be good.

Nonprofits and public benefit corporations at least have some "teeth" to them: they both allow you (in different ways) to do things that aren't directly in the interest of your fiduciary duties, and that single-minded money chasing is what incentives a lot of "bad" corporate behavior.