One wonders why they bothered grounding the Max 8s. Any competent pilot should easily be able to handle the consequences of MCAS activation on erroneous input from an AOA sensor.
I would have said spot on, however the Max8 contained software driven systems that Boeing themselves didn’t fully understand. They were coded by a guy in a Delhi software development company.
To answer your question above.. practice, but without significant investment, how does a one-man operation achieve task?
It’s not much different to someone that learns to fly in a C150, then flys a 172 for years, then his business does well and he buys a turbine Mirage to fly his staff around.