IF you are running a successful business you are probably spending the majority of your time not on the thing you are enthusiastic about, but instead just business work. Many businesses fail because the owner doesn't spend enough time in the office - many businesses owners suddenly became a lot more successful when they spent more time in the office. They likely are good and and like doing what the business is about (running a backhoe, pulling wires, or whatever), but all the office work means they never get to do it. To the employees it looks like they sold out and don't get it anymore - but the employees don't realize it is because of that office work they get their paycheck on time.

As such it is not surprise things change. You can't go from making less money than you could elsewhere to making a nice income without a lot of office time.

Of course it is common to take the above too far. There is need for office work, but often those office employees forget that it is about the real world.