I guess what does that mean though? As in not ridden a bike since childhood and they buy a Di2 bike? As a person who does the C group ride? What's the limit?

Plenty of folks drive hopped up models of Corvettes and Porsche with zero track experience.

I've always found the difference in bicycles interesting. If they want it, I don't care. Either way, there are some truly clueless even bike racer folks. They want to hammer bikes, not wrench them. Some, not many. But they exist. Had a guy do the Merckx instead of TT bike class at regionals on our team because his TT bike was still getting a tune up at a bike shop.