Clearly, that didn't happen, or a second MAX wouldn't have crashed under very similar circumstances.
> Southwest installed additional gear on their planes to help prevent this when the first plane crashed.
Southwest ordered the MAX with an AoA indicator; it wasn't retrofitted.
> ... to help prevent this ...
It's questionable whether the AoA indicator would've made a difference. However, an AoA disagree alert that is standard in the previous 737 gen was "accidentally" made part of the AoA indicator extra feature set on the MAX, and the AoA disagree just _might_ have made a difference. [1]
> It’s not far fetched that companies in countries with lesser regulations might skip out on training or plane enhancements that would lessen the chances of this problem.
An AoA indicator is not mandatory anywhere in the world.
[1] https://www.aviationtoday.com/2019/05/06/boeing-angle-of-att...
If you make controls more complicated, pilots will make more mistakes in critical situation.
Aviation adapts to problems and it always has. Southwest installed additional gear on their planes to help prevent this when the first plane crashed. It’s not far fetched that companies in countries with lesser regulations might skip out on training or plane enhancements that would lessen the chances of this problem.