Because I find it stupid to spend 2 times the money on the same hardware that you would get for a regular PC.
Who told that PCs are always having problems? Are you sure it is not just a justification in your mind because you spent so much buying a Mac.
Price is the reason, I would not buy a Mac, or any Apple product for that matter even though I can afford it. I get no satisfaction in showing off that I am of the elite class who use "Apple."
My question is: "Why in the world would anybody buy a Mac irrespective of how much money they have?"