If fact, you're correct. I'm unable to listen to the interview right now. But I'll take your word that the interview is fine. By all accounts he did a good job selling Joe on the car. But, that isn't my issue.
The image of Elon with a big doob in his mouth, splayed all over pop media, is more than enough damage for one day. Did he think that that would play out well? Did he think that every image would be carefully captioned with his comments about it being the anti-coffee? In Elon, we had an inspirational character. He was a hero to legions of wide eyed and bushy tailed STEM kids out there. Elon showed what could be done. But google Elon this morning and you get a bunch of Cheech & Chong photos.
Add that to an unending stream of antics... his well known issues with Ambien, likely other substance abuse issues, being dumb enough to engage this idiot in Thailand, "funding secured", and ongoing other drama in his personal life, the Elon show has become a mix of legend and cautionary tale. How many parents are going to want to say to their kids "this is what you can become"?
Maybe it was too much. His image was larger than life... more than what could be expected from any person.
Ah well...