Lol, until your password manager suffers a breech. Even without a full breech of data, if your password manager's password creation algorithm is made public then your passwords are just as open as anyone else's, perhaps more so. Managers are better, but they aren't the home run people think they are.
You realize there are password managers that aren't cloud based? Also, even if cloud based, they offer TFA. Some offer automatic password rotation/update for your sites. I don't see how the creation algorithm being made public would make my data "just as open as anyone else's, perhaps more so"?
