Throwing out a simple "states may not restrict abortion except in the following ways" federal codification passed by Congress (in e.g. 2009) would have taken a lot more justification than overruling a previous court decision. The latter was a "whoops we changed our minds" and the former would have been more of a "only one branch of government counts and legislative ain't it!" Perhaps there are five ethically bankrupt justices serving now, but I can only count three, and it would have been good to uncover the others sooner rather than later.

Besides, if you truly have so little faith in our institutions (congratulations on paying attention!), why bother working with them at all? It soon will be time to do something else.