I don't deny that Myles probably puts more work into his voice than Stapp does. But to insinuate that Stapp is a slacker for that? I wouldn't say Stapp's a slacker just because he likes to spend a lot of time doing other things, like raising his son and spending time with his family. That, imo, is more important than spending hours working on his voice. Just because he doesn't spend as much time on it as Myles, that doesn't make him a slacker. If that does, you might as well call a million other singers slackers.
*Edit* I posted that before I saw Marcos edit.