> why did something that was in place for 50 years needs to be revisited?
Because it was poorly reasoned judicial activism and always has been. The amount of time that a decision stands should have no bearing on how good of a decision it is.
One of the dissents in Casey v Planned Parenthood in 92 also wanted to overturn Roe, for the same reasons that the current court did.
Even Ruth Bader Ginsburg thought that Roe v Wade was poorly reasoned.