Theoretically they could have the same knowledge as a rocket engineer but that doesn't mean I would trust something they designed. Specialties exist for a reason.
I'm sure the engineers are also being asked why they couldn't just do it from scratch, 'it can't be that hard', 'shouldn't take too long', 'should be possible' all by people who have not an ounce of knowledge about how any of this works.
"Oh, I'm sure I know a lot better than the accumulated centuries' worth of knowledge from actual rocket scientists, and I can come up with solutions to their problems based on no in-depth knowledge of the field and a minute's thought."
"check of the designs and specs and you probably have enough safety margin to launch" I hope to god this is an engineer (or scientist), otherwise you have non technical people making technical calls.
Oh wait…
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