I don't think she/he is exactly saying that. I think she/he is saying that God makes use of what is available and throughout the scriptures and history, God has worked His will through the most unlikely of agents. When Satan was cast from heaven, God could have destroyed him then and there, but He didn't. He kept him around that through him we might be tried. God wants us to love Him and serve Him because we choose to do so, not because there is nothing else to do. If there were no evil, how would we learn what is good?
"For thou, O God, hast proved us: thou hast tried us, as silver is tried." (Ps. 66:10)