There is no impediment beyond neglect and lack of will to reset the focus of TBC back to where it has been in the past. The B737MAX has had issues, and TBC needs to be held accountable for what their processes resulted in, but just as it is possible for the company to alter its ways and return to technical competency, it will not occur without a commitment at all levels of the company management to do that. There has been 28 years of disregard of red flags and warnings about the direction they were going, and the board and management failed at every opportunity.
The 777 is a good product, the 787 can be with care. The 737 should be on its last rodeo, but its success is the roadblock to a white sheet project to replace it.