1. Some painters use photography and end up with bad paintings.
2. It's just a tool.
3. The use of photography is pure evil.
The whole lot fails to consider that it's the painting that counts.
I don't give a damn how the painting was done. Use any method you like but get a good result. If that's the case only detractors will complain how it was done. What counts is what's on the wall!
And I remind all here that lots of artists use traditional techniques and end up with miserable paintings.