Re: "US, Canada finally ground 737 Max jets..."
"Now that there's evidence to ground them, safety first."
2 identical planes crashing in identical ways within a couple of months of each other is surely enough evidence to have grounded them immediately.
"A grounding of all planes of that model would disrupt airline schedules, and so I think they wanted to avoid that happening."
Yeah, let's not mind the possibility of a plane crash as long as we don't disrupt airline schedules. Way to order your priorities!