I can only speculate on why but speaking from over a decade of experience, leave it to the respective gaming communities to always pick the worst, most uninspired maps every time.
I think it has something to do with the saying in game development “Given enough time players will distill the fun out if every game.”.
If a map gets you kills fast it will be always picked above anything else. It doesn’t even have to be a guarantee, the prospect alone for getting a high kill count is enough. This results in either very small maps being favored (Nuketown, Shipment) or maps with critical chokepoints (Operation Locker (BF4), Metro (BF3,BF4)), Fort de Vaux (BF1)). Also maps that allow for cheap non-counterable tactics to get kills like Base Rape (Suez (BF1)), Vehicle Camping (Golmund (BF4)), Spawn Camping (Piccadilly, (MW2019)), etc…
Generally, every map that rewards unsportsmanlike behavior will be a community favorite.
If I ever were to release a video game I would never allow for map voting. As a player, I’d rather play maps that I dislike every once in a while instead the same 5 maps every time. And as a developer, why should I bother to invests tens of thousands of dollars to make a DLC with maps, if they are never going to be played anyway. The cherry on top is, the community still has the audacity to complain if a DLC has less maps than the last one, but then never play them anyway.