You’re sitting in a seat in the latest jetliner. The pilot comes on and says that there is some severe turbulence ahead and everybody take their seats and tighten your seat belt. Do you feel more comfortable knowing that the plane was designed by someone who barely passed their structures class or someone who aced it?
Obviously an absurd example, but you get the point.
Mistakes cost a company money and the better the engineers, the fewer mistakes.
Can’t remember who the Mercury astronaut was; but there was once a story that he was sitting atop the rocket waiting out some kind of hold to fix a problem and all he could think about was that the rocket, essentially a semi-controlled bomb, was designed and built by the lowest bidder.