OP isn't saying that planes crash all the time, OP is saying that airlines have a history of overlooking things that would cost them money rather than doing the safe thing and grounding their planes.

This is a very real problem and has cost people their lives, especially relevant in recent times as we are not too removed from notable instances like the Boeing 737 Max incidents in which the planes were grounded after two crashes due to a single faulty sensor that was known about but ignored, which would cause the MCAS system to fly the plane in a dive and crash into the ground regardless of the pilots trying to prevent it, only experienced crews who knew about the system knew to disable it and prevent the crash.

https://en.wikipedia.org/wiki/Boeing_737_MAX#Accidents_and_incidents

Or the scandal when it was revealed that 262 Pakistani pilots had fake licenses, very little or no flying experience before getting in the planes and had even gone so far as to pay other people to go take their exams for them.

https://edition.cnn.com/2020/06/25/business/pakistan-fake-pilot-intl-hnk/index.html

The air industry has relatively few deaths per mile travelled compared to other modes of transportation because they typically don't tolerate anything but the highest standards and they don't let any random person who passes a really easy test at ~17 years old to start piloting planes.