Thats the point of the whole game.
Day 1 you start buying players and build up a team till day 28
Then the game restarts and you start all over again while each season gets slightly harder then the previous one
Besides if they didnt do this I would be an Oprah winfrey show YOU GET A 9 STAR TEAM YOU GET A 9 STAR TEAM EVERYBODY GETS A 9 STAR TEAM