If they said "The game is locked to 30fps" I'd probably have been ok with that. It's not a fast paced game, and capping the framerate at a low value is probably a decent enough design choice for that particular game. As you say, it's enough that you won't really notice it in gameplay.

The problem is that we're talking about the absolute highest end consumer card sold by nVidia rendering a blank map, without such a framerate lock in place. If it's not locked, then that framerate is the product of a performance bottleneck somewhere. With a modern gaming PC, "performance bottleneck" also means you're sitting next to a moderately powerful space heater.