How come we need to get into different servers to log on AJ?

Hey guys, I've been thinking again about something. Why cant we all just be in one server? It's unfair, I know, because people want to see their friends and it takes really long to get onto the same server their in (Normally when your following people when you go to press the button it says in Jamaa Township but sometimes people actually are in Jamaa Township for trading) and then when your screen finally loads and you end up in some random place like Crystal sands and you click your buddies list again, slowly drag your mouse over to the buddy you were looking for, press their nametag, hover your mouse over the follow them button and before you know it their offline. But there's a reason we have servers. Basically, imagine if there was only one server (you can call it whatever you want). Imagine over 10,000 people being in one. A lot of the time the server would probably crash because to many people are in one world. People that play Animal Jam love it and sometimes want it to last forever but even though it can be a pain with servers sometimes and glitches but if we only had one server AJ probably wouldn't be here today.