I see you don't have a clue as to what is going on at Boeing or with the 737.
The -8 and -9 were only grounded because of public opinion, not whether the plane is safe or not.
When you look at the two that went down, Lion Air had only just been removed from the "don't fly" list due to several safety violations prior to their plane going down. Now, I'm not saying there wasn't an issue with the plane, there obviously is for reasons that I won't try to explain, but I will also say that there were training failures having to do with the flight crews AND ground maintenance crews. The first plane to go down only made it to an airport the prior flight because a third pilot was on board that knew how to manually over ride the system. When the plane went back up, the new crew wasn't as fortunate and the plane went down, even though the ground crew said it was good to go, which it wasn't. The second plane had the same issue as the first, lack of training on the new systems. The ground crews also didn't have the training to properly trouble shoot the system, the system being one of several new to the plane. These are known facts, not guesses. The FAA only told Boeing the series was grounded and to fix the issues, which Boeing is doing. They are rewriting software, changing/re-configuring hardware as needed and eliminating the issues, which takes time. Boeing rushed the roll out on the MAX series to keep up with Airbus, something they are now paying for. With all that said, the FAA has plenty of time and resources to enforce PL115-254 since the FAA has assets that are assigned to Boeing, as well as other manufacturers and maintenance companies, that go no where else. That leaves the rest of their field agents free to cover the airports and flying fields to make sure that J.Q. Public is following the laws put out by the FAA and Congress, REGARDLESS OF WHAT THE AMA HOME OFFICE SAYS