Agreed on Roe and Plessey being wrongly decided.
The Supreme Court does not always get it right for sure. And Justices would echo that.
And as in the case of the Colorado Supreme Court, sometimes they get it really wrong. Things usually get worked out - but it can take time. Heck, the 2nd Amendment was not fully incorporated until 2010! :)
Precisely my point. The judiciary is a big herd. It takes them awhile to move, and they have to want to move. If they see no reason to move, they simply adopt "precedent" and just declare the matter settled. Argumentum ad antiquitatum.