Everything has to be taken in the proper context.
Proper training is simply the only answer.
Want your engineer to run your aircraft...train them to that point to do it safely.
When are pilots undergoing flight school allowed to solo and start the machine alone while the instructor sits inside drinking his morning coffee? That should be the benchmark
Ive worked with many twatwaffles, both engineers and pilots. No one group can claim superiority over the other.
Some pilots i dont trust with a grease gun. Some engineers shouldnt even turn on the battery switch. But with the proper care, control and training...it can be a successful event.