There is a logic to super cars. One of the things they do is develop new technologies that eventually lead down to cheaper models. So they serve the front of advertising and research and development. The fact that Tesla does not advertise at all means the roadster is probably more important to Tesla than something like the new Cadillac is to GM. The new roadster will generate a huge amount of buzz when it is on the road. And on top of all that, the numbers it is made and will actually lead to positive profits.
There's also something to be said for a no-holds-barred, best-effort EV by Tesla—the ultimate flagship. If Tesla doesn't do it with the Roadster, other manufacturers will do it and claim bragging rights. It's not just a vehicle for those who can afford it, but bragging rights about EV tech generally which will trounce the ICE 'competition' along with lesser EVs. This dovetails into the great point made in this thread about the Roadster being a passive and powerful advertisement for Tesla and EVs generally.
What new tech can Tesla demonstrate with the Roadster? How about the SpaceX cold thruster package? This flexes not just Tesla muscle; it's a hardware proof-of-concept that demonstrates cross-pollination between two Elon-run companies, Tesla and SpaceX. Which other manufacturer has this? Zero.
We know that Elon allows engineers to work between both Tesla and SpaceX if they desire, and what's better for the best and brightest engineers than a chance to be part of history-making pursuits in real-world AI, the world's best EVs, and spaceships that resupply the I.S.S and land on their struts? Engineers can work on a variety of projects, including some I didn't mention. Talk about exciting. No wonder new engineering graduates want to work for Tesla and/or SpaceX, and they really can work at both.
And, that's just what's happening now. Elon being Elon, we know he wants to go beyond Earth, and I have no doubt that he'll do it.
Jay Leno's Garage and others will test this vehicle and talk about it, and as others have said it's an enduring and exciting advertisement, especially if someone sees it in-person. It'll destroy other vehicles at the dragstrip in sensational, evergreen videos which will drive endless conversations not just about the superiority of Tesla (and SpaceX) but the superiority of EVs over ICE, assuming there's anyone left that needs convincing.
If money were no object I'd have a Tesla Roadster v2 in white with a black interior and with the SpaceX package. Until then, I'll have to keep investing and watching with bated bull breath to see what Tesla unveils in the future. If history is any guide, it's going to be far better than we think.