"The hydraulic system broke"
"A" hydraulic system broke. Civilian transports are designed with three. Yes, it's an emergency and they are required to land at first opportunity, but it's not an "OMG we're going to die!" situation. They train for that.
I say this as one who wants the top 346 execs at boeing fired, one for each of the people their deadly-as-designed 737 maxes killed.