I agree completely. A homemade burger isn't that bad for you. It's all the numbers that they put in the processed foods that make it bad. 401, 951, etc.
I make great home made burgers, nothing fancy, just good ingredients...
People seem very comfortable trading health and control of what goes into their bodies for ease of use. I don't know if it's just laziness or stupidity and laziness combined. Nothing wrong with eating this stuff sometimes I guess, but it seems to be the staple diet these days.
It's certainly much easier to not have to make it yourself. So I'd certainly go with laziness or certainly time poor. Stupidity, maybe. I do think people know that it does them no good, but I think many aren't truly aware exactly what the ingredients are in them. So it's easy to put it to the back of your mind. As long as the effects aren't immediately apparent, then it can't be all that bad, surely?! Sickness and obesity can creep up slowly.
Says it all pretty well doesn't it. :)