Compared to what?
Paying 10% more for a product in perpetuity costs a lot more than a 12 to 24 month period where prices double. And for non-essential goods, the option is for some customers to simple delay purchase.
And you’re forgetting it works in both directions. Consumers may see temporary high prices but they often see temporary low prices during supply chain recovery.
And again, how do you accurately predict the future? Demand can double pretty quickly. Having 10% slack (and the cost of it) would have dampened higher prices somewhat, but now you’re paying higher prices all the time and slightly less high prices when things go sideways. Doesn’t seem like a good deal at all.
I’d much prefer the free market approach where there are multiple actors each making different bets on future demand than some overarching rule about how future demand should be planned for (thats how we get famines).
The producers who bet on increased demand (or shrinking supply from competitors) get handsomely rewarded for the bet.