Exactly.
A point I argued a long time ago - part of the reason nobody votes for anything but Breeze/SG 4 is because that's all they've played - they're used to it. By voting for it and playing it again, it will stay that way - by forcing them to play something else once in a while, they might find something else they may like more and we'll start seeing more variety and people will be happier since they found a map they enjoy even more. It can't do much of any harm.
Unfortunately, the servers are not easily capable of tracking which maps have been played many times before - when the servers restart, they do a complete restart. It wipes all information and every little thing that happened last time it was up and starts completely fresh. It's simply not that easy.