Because 3000 people should be manageable in a zone.
15,000 who are trying to try out the game isn’t.
Sharding in AQ, totally there with you that if they do it, its a blatant betrayal. No sharding should exist beyond the starter zones and not after the launch bulge has gone. We’re in agreement except for the first 2 hours of your character’s life.
You’re not arguing against me on those points, you’re simply saying you don’t trust Blizzard, and therefore no sharding ever at all, which is silly because the system isn’t going to disappear from the code base.