OneMoreUser
Prominent
I bet it is just a marketing ploy meant to make people think it is very advanced, but the reality it is likely the requirements are about the graphics and those being not so optimized.The real question is did they develop it for PC first. If they did then the specs do seem a bit high, although squarely in the mid-range category for gaming PCs. If they developed for consoles first then ported to PC then...They may seem a bit low.
Full disclosure - I want Civ7 to be great, but 6 was not an improvement on 5 when it comes to game play and 7 seems to be more of the same.