There's wisdom in what you say. At the same time, technology adoption curves only get to 100% at the asymptote. For example, one still encounters a need to send a fax from time to time, and some people still have landlines.
That said, the auto market at 50% or 70% EV adoption will still be a big deal! And we might find out that some of the issues that folks see with EVs are solvable and/or aren't that important anyway. For example: the average American summer road trip is under 300 miles, so the range anxiety might be ameliorated by wider availability of faster chargers than are available today. Similarly, we might learn that users of heavy equipment are in the habit of taking breaks during which they could charge their equipment, etc.