Maybe, but maybe you are too:
It’s not as simple as the number of players online. The number of players in a region/zone is also a factor. A server with 5k players could have 1 layer while a server with 2k players that happen to all be crammed into one region could have 2 or more.
If 1,000 players travel together to one place to farm the same thing, there would be added layers purely to alleviate server load… but if those players arrive over time, and nearly all of them change their mind & leave because it’s already too farmed by 50-100 players then you never get to 1,000 and therefor never get any added layers, which means no scaling resources.