Easy to figure out? I don't know... you'd need to know the …

Mayhaps you're missing a bit of the point. You don't need to know the exact price just know that what we're being led to believe is the price is definitely undervalued. It is so essential that ultimately is priceless until they figure out new methods for finding & extracting and refining. The scarcity which we already know is just that in a world where there is more and more demand and we don't have the technologies to speed up production so there is an opportunity cost built into the proof of work over time. So ultimately they're putting metrics to something that is unknown so I'm fundamentally not disagreeing with you, but they can get a hell of a lot closer than what they saying and so far as output versus demand.
What they're saying the value is at any given time is immediately obsolete due to increasing demand they can project some some so futures are a better metric I would say, but again if you take on faith the paper the basements and then remove those then you can get closer to what the actual value may be at any given time and just know that you are not wrong when you ascertain those numbers and they look ridiculous. That's the whole gambit here