Given that Musk has said himself that his titles don't mean anything[1], and the fact that he chose to give himself the title of Chief Engineer in response to people on Twitter making fun of him, it makes me believe that his self-appointed title as Chief Engineer is about as meaningful as his title of Technoking at Tesla.
Musk isn't an engineer, he has no engineer credentials and isn't licensed to engineer in any country. Moreover, Musk has never engineered anything.
Given the fact that both companies hire hordes of real, licensed and credentialed engineers, says that, yes, the engineers at both companies are responsible for the hard engineering work.
I prefer to stick with actual facts and not feelings or insults. I'm not sure why stating the basic fact that Musk is not an engineer would upset you so much.
It doesnt upset me, it goes against all evidence. There are hours of video online about him answering details about rocket technology, battery technology etc. He is a very technical CEO, not some bullshit artist like the Nikola guy.
He doesnt have an engineering degree, that doesnt mean a whole lot anyways.
I suspect he has achieved more than you ever will.