There’s a few things that some players will just never accept and that is that there’s very little reason to not play on “THE” server because they’re guaranteed to last and it’s better to just deal with queues for awhile than waste your time on a dead server.
The second being that most people simply do not care about World PVP and most of the time will just pick the dominated server of whatever faction they want to play because better PVE guilds have almost always gone to PVP servers. Hence why the biggest NA servers are Benediction for Alliance and Whitemane / Faerlina for Horde.
It’s always been like this.