The R&D expenditure seems reasonable, and the revenue numbers seem realistic. I have no trouble believing they can be profitable by 2030 or much sooner. What I don't get is how you get from $30B in revenue to a nearly $1T valuation, but that seems almost level-headed compared to SpaceX, and it's not like any of the big tech companies' valuations make much sense in the context of their revenue.
There is something that has fundamentally changed (or broken, depending on your perspective) with the valuation of American tech companies. They've always traded at a premium, but the pandemic and the encroachment of the monopolists has turned the earth sour.