I’ve been in aircraft maintenance for 43 years. It is taken very seriously. We would rather have an aircraft on the ground with us scratching our heads, than an aircraft at 10,000ft with no power and two worried crew on board.
Perhaps some other countries have lower standards (ok, I know some do) and there are a few rogue companies somehow still in existence, but nobody in the U.K. or Europe need worry. You’ll fall down the stairs and break your neck before you’re involved in a plane crash in our airspace.