Because they are the only manufacturer of EVs that look and feel mostly like regular cars. It's really that simple. Also, please don't miss the "I believe" part of my statement, I have zero facts to back this up, it's just my opinion.
> Furthermore, the look of Tesla vehicles is 100% optimized for drag efficiency.
Who cares? I want my car to be 100% optimized for not looking like a deranged design experiment. I want it to look like all the other cars. I, just like most other people, aren't special and don't really care to look that way either.