why map pools?

i cannot fathom why there are map pools when val only has like 10 maps! how does having a map pool (with essentially only 8 maps to choose from since fracture and pearl haven’t been seen in 7 months) help the game in any way?

i’m sure there’s a reason, but why? does anyone even LIKE map pools?

i get that it can make seasons feel fresh, but i come from overwatch, where we tried map pools with 20+ maps and still thought the pool as still too small. now, that’s with four different game modes, so it’s a tad different but… still.

why map pools?