I don't really disagree, but still, I think selling is an active and costly process.
Selling the first devices is free, because there are curious people (or stupid one, if your device is really crap).
Then if you want to sell more, you need to spend on marketing, with convex costs. So there is always a point when you don't want to sell more (you can still wish you would sell more, though).

So it really depends on if you understand "wanting" as "wishing" or "intending".