Didn't do it for me...
I kind of thought the same thing...it's perhaps a bit too cute for my money. Also, he could be arguing for ANY motorcycle, not just a Zero. Almost every bike is cheaper to run, better for the environment, more fun and easier to commute on than pretty much any 4-wheeled vehicle. Since he shoots down pretty much any argument he might use, it seems like he's pretty much saying it all boils down to "I want to because I want to".
For me, my priorities were:
1) My first (and only) test-drive of a Tesla instantly hooked me on the torque, responsiveness and other delights that EVs offer. Yes, that's an aesthetic "I want it because I want it" argument. So I'm a hypocrite, so what?
2) This nation and this world has to break our addiction to petroleum, and fast. If that's a liberal point of view, then I'm really, REALLY liberal on this point. I'm terrified that we're already 50 years too late in converting to other forms of generation and storage of energy. This downhill environmental slide that we're already on could very easily turn into a cliff at a moment's notice, and it may already be beyond our capability of reversing regardless how much tech and money we throw at the problem. If we're going to have any chance at stabilizing things, some people are going to have to step up and help get some new technologies mature and become more mainstream. For me, this is an important way of stepping up.
3) Lower running costs are great, though I don't really believe they balance in the Zero's favor until you get into the 50,000-mile range or more, maybe significantly more. But I don't visit the gas station much any more these days! And I'm working on getting to the break-even point, too...31,000 miles in just over three years now.
4) It's a great toy and conversation piece. It's new, exciting and not very many people have one (yet). I'm an EE, and though some people (like my dad) may think I have a toy problem, I think I just have a passion for electrical/electronic devices of all kinds. Electronics has been very good to me as a career, and if I can keep that passion lit, it's a good thing. It's pretty damn fun, too.
5) For all the reasons listed above and others, it's very clear (at least to me) that EVs are the wave of the future. I like being ahead of the curve. I'm not really addicted to being on the leading edge, but I definitely enjoy it recreationally.