I know about the MEL.
And it is probably not nice for the pilot to fly with to many MELs.
But as a pilot, do you think there are flights where the plane should have repaired before departure. And do pilots have the courage to say NO to a flight, only with suspicion to a fault.
You can also have temporary failures which are hard to find, and not pressent by mechanics troubleshooting.
I know that it is a bit provocative questions.
But it may well stand as a pilot in the dilema that was to choose between having a suspected fault and ground plane that cost the company a lot of money, or to fly with an fault.