A PR stunt until they feel things have blown over and they’ll ramp right back up.

It's less of a stunt and more of human nature. They messed up, they realize it, they put controls in place to prevent similar errors, they get into a groove, they loosen the rules to streamline the process, they mess up, they realize it, ....

This is how every single entity in every single production industry works. Financial markets? Obviously. Food Safety? Of course. Buildings and bridges? Uh, yeah. Security? In the news all the time. Submersible adventures to the Titanic? LOL. It is an exceptionally rare condition where an error and a reaction leads to a permanent chance in procedure (though they do exist).