While I can agree on the PP part, coplayers are a natural development. When I started playing Tribalwars back in 2007 (w5) I was 15 years old. A lot of free time to invest into the game and back then it was no issue.
Now I'm 29, and I can tell you without a coplayer there is just no way to do this. I dont even have a wife/kids and I cant do solo endgame. Its just too much