She does have experience doing actual technical work and anyway, at her level I expect her knowledge to be more high level.
To take your example, she doesn't need to be able to weld rollcages into racecars, but she may be able to understand that a rollcage can only be expected to be useful in X cases or that a good rollcage should have Y features.
Similar to how Elon most likely isn't telling people to change X flange into a weld by adjusting the pipe by Y mm, but rather asking his engineers what they would adjust to achieve Z and the technical tradeoffs, then stating what he thinks is acceptable and what isn't.
I agree, hence the mechanic engineering degree is basically worthless IMO.
Even in your example, any person with a functioning brain would understand your X and Y examples. So what exactly to mechanical engineers learn? As someone that went through it, I can assure you it's almost nothing. It's just a 4 year grinder so they can put a stamp on who can do medium level math and put up with the grind. The learning is up to you after.
Yeah, that's a good point. When I was talking about her background I was mainly trying to emphasize how she differs to the business leaders of other big space companies. Since I think that a big reason for the utter stagnation of the previous rocketry giants has been the systemic dominance of non-technical penny pinchers over engineers with a business lean. But yes, it does come down to the desire to learn rather than what degree they hold.
To take your example, she doesn't need to be able to weld rollcages into racecars, but she may be able to understand that a rollcage can only be expected to be useful in X cases or that a good rollcage should have Y features.
Similar to how Elon most likely isn't telling people to change X flange into a weld by adjusting the pipe by Y mm, but rather asking his engineers what they would adjust to achieve Z and the technical tradeoffs, then stating what he thinks is acceptable and what isn't.