One can't run a business successfully without accounting for the Cost of Doing Business in their pricing.
But the point is that I'm not running a business. I am pursuing a hobby for my own pleasure.
Let me for the sake of illustration push your argument beyond the ridiculuous:
I can't make a shot of a sunset and frame it, because I'll be losing money and undercutting the pros. After all - by doing it myself, and not buying from the pro, the pro is going out of business.
And further, it's easier for me to purchase a sunset print from somewhere. The quality is going to be higher, the picture will be better and I won't have to invest 6 grand, like I did in equipment. I have about 10 pictures hanging around on the walls. It means each of them is about 600 bucks.
Oh goodness - I'm losing money! 

