If your focus in pure money ROI then I supposed you would be right. At some point, however, we need to vote with our wallets to influence larger investment decisions. At the early stages of adoption per-unit costs will be higher than volume manufacturing. This is where Tesla is at this point (and the EV segment as a whole). If I continued to buy internal combustion vehicles because they were cheaper then I would continue to prop up a segment that needs to either be deprecated or pivot.

At this price point I am willing to vote with my wallet in hopes that it will spur on further investment to broaden the market in turn driving down prices through better technology and higher volume sales. This is no different than the PC market in the 1980s - very expensive to buy a PC, but if none of us did then we would have had a different outcome.

What is different about this investment than, say, buying a Ferrari is that this feels like something that is moving us forward rather than burning cash on a cool car that the ladies will dig (although you do hope for that as well - it's cool being green after all, right? :)).