This is a very dismissive statement, like people saying iPhones only sell because something something marketing.
They sell well because they're smartly engineered, fun to drive, comfy and intuitive inside, safe af, and are literally the only EV's with a practical battery life and convenient, economical charging network (no monthly fees + super fast exclusive protocol so stations aren't clogged with hybrids). The cool factor is a product of those things. The polarizing and eccentric CEO adds to that as well.
It's almost as if you just designed an EV worth a damn, and not lazily phone it in as a compliance car (BMW, Honda, et al.), but actually framed it as a next-generation product that your company's growth depends on, people would actually buy it! Wow! Crazy!