TFA is basically right. In a The Boring Company presentation, one of the lead engineers started to answer a question technically, then Musk stepped in and built

TFA is basically right. In a The Boring Company presentation, one of the lead engineers started to answer a question technically, then Musk stepped in and built an inspiring context within which to frame the question. His role in his conpmanies, that is visible from the outside, is that of a promoter. He also put money up in the first place. And for all I know, he is personally a brilliant engineer - but there's no evidence of that visible. A Jobsian RDF. Jobs appreciated the technical aspects, inspired great work out of technical people - but didn't invent anything himself.