The certification process being "difficult" isn't why the 737 Max was unsafe. The FAA allowed Boeing to self-certify its safety, and voices inside the company were ignored or silence. They literally created a system to save a buck for their clients then outsourced development of that system to save another buck, then rubber-stamped it themselves.
Blaming this on too much or too difficult regulation is farcical.
PS - I also find the entire thrust of this argument contradictory: "Equipment built in the 80s wasn't high enough quality for the new 5G operating environment, so we need to weaken 'difficult' regulation today to make producing lower quality equipment cheaper, tomorrow be damned."