Around the time just before the MAX was grounded, I remember there being lots of unfounded speculations (here on HN as well!) that Lion Air's and Ethiopian's pilots were somehow substandard and lacking the training of their first world counterparts. Meanwhile it was Boeing actively keeping vital information and training from pilots.

The lesson from this is still not learned, and can see at least one apologist on this thread repeating this same BS again...it's infuriating.