What does "scarce" mean to you?
I'd wager that to most reasonable people it means "available in a supply that, measured against demand, is low". Market forces typically react to such a state by pushing prices up. Saying "they're not scarce, they're just expensive" is just silly.
The exception to this would be during e.g. supply chain hiccups (lots of compute sitting there, unable to get to its operational destination) or when other forces artificially push up prices. But that's not what we're seeing here. Compute is much scarcer than it's been for years.