Obviously, someone who decides to use EZMix makes a judgement call: that the plug-in can help him or her come up w/ a mix that's
at least as good or potentially even better than what he or she could have achieved on his own.
If a musician or a songwriter is humble enough to admit it and entertains no idea of becoming a proficient mix engineer, why not?
I prefer to learn and earn the skills, but I can see where this type of plug-in can come in handy. Plus, not every gig requires Roger Nichols type of skills. There's plenty of poorly mixed music out there on the air already - not sure EZMix could actually make it worst...