No you're wrong. Just because you can do everything on a 1000 people server on paper, doesn't mean you can pull it off on practice. I can't just server transfer to a 5000 people server(if they exist) and finish all T4 in a day, I still need to go through the process of sending out app to endgame LSs, begging every leader for a pearl, lv new jobs to fulfill their needs, take time to chat and build connections etc and that is A LOT of time investment. While I can finish all T4s in a day on a 300 people server with LS(s) that I'm already in, gain leadership positions and organize my own endgame runs, use my favorite setup, get 5 extra prebuff mules without having to pay people. I can't do any of these things on any of the NotRagnarok server without heavy time investment just because I don't have the connections to do so. Even if you think I can if I want to/work hard/lv 4+ mules myself, I can't, realistically speaking.
Doing certain stuff is more than just pull people out of a big number pools, it involves many, many, many different factors.
The endgame environment of Asura is just too different from NotAsura. Lower multi box rate, highly competitive job market, less opportunity to gain social influences in endgame scenes(unless you're some kind of superstar player) are some of the Asura traits. Think of it as big city with google/microsoft v.s smaller towns. When you send out a job app to a big company in a big city, you're competing with 400 people wanting the same job and you don't necessary get one. When you send out an app to a small company in your hometown you get the job more easily and gets promotion faster. And there's very little you can do to change that fact. Can you get a job at Microsoft if you work hard? Sure you can! But not everyone can or wants to. Some people may become super successful in big cities, some people just don't and live on streets when they could have at least got a manager job in their hometown, at family owned cornerstore.
My point is, everyone has different circumstances. What works for one person doesn't necessary work for everyone.