This is an example of where “vote with your dollar” and “invisible hand of the market” falls down, and why we need strong regulations.
Time without incidents will be needed to earn many of our trusts back.
You talk of the regulation but posts on HN have shown how the regulators have failed and even why it's happened.
Who is more likely to have quality control issues? The company that has had more planes crash or the company that has had fewer planes crash?
Meanwhile companies like IaG are buying more 737-Max, knowing full well their customers will base their purchase on the cheapest hit on skyscanner.