It's more abouy failed leadership than failed engineering. It has to do with how Flint spread responsibility over their water source so thin that no one was to blame and no one had the full picture. Laziness gave way to corruption. I'm sure there were protests from the engineering team.
Defund or mismanage (due to incompetence, malice, or a mix) government until you cause a disaster, point at the disaster, and blame it on the government...classic Red Team strategy in action.
I sure do and I realize this was largely the State's fault. I didn't mean to say "Flint spread the responsibility so thin" so much as "The responsibility was spread thin between Flint and the State"