> Meaning they tried to skirt around the regulations, including regulatory capture by pushing self-certification because competition caught up to them while they spent money on buybacks instead of investing in R&D, perhaps even investing in absorbing some costs of certification of pilots into a new type they could develop into the future instead of relying on a design from 60 years ago.

No, this is literally the opposite of what happened. They did not want all the operators to go through lengthy and expensive recertification processes as required by the FAA so they make the system as close as possible which likely cost them millions of dollars.

The issue was that pilots were not aware, they received very little training and knowledge on the subject when they should have had more (just not a new type cert)