You sound like a hard working entrepreneur. Good for you!
Window cleaning (and carpet cleaning, lawn care, fast food work, construction laborer, etc.) is an important job.
Some of us choose to earn a living in other ways. That's all. I don't knock what you do for a living. So try not to be defensive. I just decided early on that I'd rather make a living with my mind - not with my muscles.
Every person walks his own path in life.