The important part is knowing how to do good design,
Bingo! nailed it, I've got 35 years of correcting engineering disasters. Size for size screw fits, Oh, here's a good one. An engineer from M&M Mars called me up in the 80's, wanted to know what the capacity of my press was. I tell him "my vertical press is 75T, why does he ask"? Well, each color of M&M's go through a polishing tube that looks pretty much like a cement mixer but about 40' long. Each one rides on eight Road Runner forklift tires that are pressed onto a WA-35 Taper-Loc weld in hub in a piece of 3/4 plate welded into a 14" X 6" DOM tube. The
degreed engineer didn’t know how to figure interference fit so on the print just put (75 ton press fit) to push the forklift tire on.
Of course back then there was no google so it actually took some thought, like maybe call the manufacturer to get the spec?!?! I,,,, At the time was 18 and by all accounts not even close to an engineer, only 8 years of working at my families machine shop along with the 4 years I had in high school knew how to open the machinery's handbook and figure the size to get that much tonnage for a fit.
It only took M&M 30 years of blowing out forklift tires once a month to go back and realize 75 tons was actually fracturing the rubber causing them to fail prematurely! Wow, 6 colors of M&M's times two styles (Plain and peanut) times 8 wheels per color (96 wheels per plant) times 8 plants (768) wheels per month to get retreaded ($705) = $541,540 per month. WHEW! Granted,,, I only got to do two plants (Cleveland TN. and Hackettstown N.J.) but hey, I wasn't complaining, And I wasn't the engineer that cost them several mill.
Wanna discuss cell phones and engineering? Sure,,,, I contract with Foxconn, Xiaomi, Oppo, not to mention Nook (Hon Hei, another part of Foxconn). My company builds their fixtures, and set up many of the manufacturing processes and for the most part the only engineers I ever see are the electronics guys. The rest are not really engineers just CAD jockeys, they’re looking for the cosmetics value then pass it off to the electronics guys to make it fit inside the housing. Sure, they may need to add post or recesses but guess what, their just guys out ot Polytech with NX skills, Not engineers.
Unless you're dealing with a place still using ProE Wildfire 2.0 (in which case don't walk, run away) it simply doesn't take that long to transition.
Interesting, do you have kids that like Hot Wheels or Barbie? I'm a tooling supplier to Mattel China, pushing around 400-500 tools a year (Well, until Covid). the lead designer in that department is pushing 70 and still uses ProE. Seems to still workout pretty well, well enough I just swapped to PTC Creo.
Lots of outdated CAD out there, I still use DeltaCad for quick 2D DXF sketching. Just because its old doesn’t mean it's not got a place.
Without knowing more about what the OP wants, I'll say that a couple sophomore level engineering courses taken individually might be eye opening and highly informative.
I agree that it wouldn't hurt to have some basic engineering courses but that's not necessarily where the money's at. He said he wants to open doors, we could always point him towards a hot dog stand.