I didn't 'double-down'; for instance, I agreed with you that "[t]here are intellectually consistent frameworks which could justify most of Musk's beliefs".

I also agree that 'just the carbon tax' would be more intellectually consistent than the myriad of other automotive propulsion policies Musk has advocated, but he happens to have advocated all those policies in addition to the carbon tax.

What are you looking for in a productive discussion? An apology because I might have offended the great Elon?