Yes and no.
Bitcoin is indeed scarce. Bitcoin has indeed limited supply. Indeed, as long as there's demand, with the supply remaining fixed, the price will rise. But imho it's not that easy to grasp why there's such demand for Bitcoin.
All in all, the internals are clearer than its economics, because the economics imply human reactions, which, as you noted, can change over time.
So while I expect him to understand (if he cares) the internals, it could have taken indeed some more time to digest its economics and understand its potential.
Here's a difference. This guy is posting whatever suits him now, whatever he feels now and doesn't give a shit about the consequences.
Keep in mind that he's a billionaire hence he can live very well with or without Bitcoin ever existing. And he doesn't seem to take anything serious enough.
Edit: fixed typo