I don't remember the context, but remember the quote - "I didn't lie, I just said some things that turned out not to be true." With this field, I've often wondered if there were two groups of people working together. A money group, who really wants it to work, and an eco/science group, who doesn't care about the money part. If those two groups don't ask hard questions of each other, they can lie to the public without knowing it. And if they do, they might be able to justify the actions in their heads as appropriate - OK to rip of silly venture capitalists either for the general harmlessness of it, or for the greater cause of improving the available technology that might be useful in the future.
Or maybe they were hoping for subsidies to make the research possible, and then to gain ownership of some sort of magical patents that would allow monopolizing the tech later on. The later kind of what happened in the PC industry in the late 70's to early 90's. For airplanes, though, I don't see any of that happening again. The physics seem pretty simple to me...electric motors have been around since the original Tesla.
My own experience and observations on this... I was in neither group, but I got to watch it unfold from the very early stages. In this case it wasn't aviation related, but a very technical area with a lot of regulatory issues and oversight, so some similarities.
The investors naturally wanted to know that the business types (and I use this term quite loosely) had their poop in a group, knew what they were doing, had a solid plan for success, and all of that. The "business types" seeking funding had a seat of fairly revolutionary ideas, and they came up with presentations that were intended to extract the maximum amount of cash from the investors. Period. Were those plans in any way realistic? Well, they talked a good game. It seemed doable, if optimistic, at the time. As it turned out, their "plans" were more wildly optimistic pipe dreams, assuming that they could invent entirely new things that no one had ever done before on a very short timeline.
It soon became apparent that these things were not going to be somehow prestidigitated from thin air. It was do-able, but not with the group they had assembled. The business types made an understandable decision to shift their focus to a more traditional business model. We all figured that was a temporary measure while work continued on the "revolutionary new stuff", but somehow no one ever heard any of that stuff mentioned again. Ever. I don't know if they ever really explained to the investors that the new direction was all they could manage; I wasn't in the room for those discussions. At some point they seemed to lose all appetite for the visionary stuff they'd set out to do. So the visionaries left, the drones they'd hired from everybody else set out to build something just like everyone else had, some empire building commenced, and the results were predictable and unfortunate. Things were great right up until the VC money tap got turned off, then things got really ugly really quickly. Last I heard the tattered remnants were hanging in but the regulators and tax people were circling like sharks around a swimmer with a fresh cut.
In the case of Eviation (and a lot of others), I think the founders just
count on fantasize rapid, exponential advances in technology that will let their creation come into being; "In a couple years we'll have new super-duper batteries with pixie dust". Of course these things just aren't happening within a time scale that will help them. In the case of Eviation specifically, it sure seems like their "airplane designers" didn't have much of a concept of how airplanes and aircraft operations actually work in the physical world, based on their early design choices. When it became obvious that they'd never get serious range out of their creation, they then seem to have just assumed the presence or creation of a new market that simply does not exist (short-hop prop air taxi service).
So, some VC groups lose a few dozen or a few hundred mil. Eventually the company will go nips up, the pieces that are worth something - if there are any - will get sold off, and the VC guys might recover a few cents on the dollar. They're investing in a lot of companies, though, and some of them make a LOT of money. The ones that were invested in the company I worked for have billions of dollars in dozens or hundreds of companies, some of which return many times the investments.