Not everything that a business spends it's money on is a tax write off. The thing is, there are a lot of things that are. The system is set up for the rich, there can be no denying that, and one need not really show a profit, just an investment.
The cool thing about it, though, is that most people can do it if they have even a minimal financial education, which schools don't teach. For instance, if I were smart (and was really dedicated to doing so), I could start a property company. The first thing that I would do with the business, is buy my house, then rent it to myself. But, in actuallity, I would maybe start two properties, one to own the land that my house sits on, and one to own the actual house itself.
What are the benefits, you ask.
First, I am CEO of an LLC. As such, say, I need a car. Rather then buy the car out of my own pocket, the business buys it for me as an expense. Now, not only am I "not paying for the car", but the car note is a tax write off "for the business" (at the current rate, I can write off up to $75,000 per vehicle). So what costs you $75,000 would not cost me the same amount. Secondly, as two businesses, I can write off the same expenses twice.
Next, although you can't do this for the land itself, I can write off depreciation of the building itself, as well as items inside of it, such as dishwashers, washing machines, etc. I may have to sell the pay back the depreciation when I sell the house, but only if I don't do a 1031 tax exchange on the property.
If improvements need to be made, I can now write it off as an expense.
So, although not every expense is a write-off, there is a lot of things that are. And by incorporating, business owners save a ton of money on taxes for things that you and I do not.
In short, WC and Dancing, you are both correct, but I think the confusion is that you aren't exactly speaking about the same thing.