you're assuming i have no basis, and you know what happens when you assume
i could base it on the fact that in 8 years i have never seen any keyboard/mouse macro/hot key system make a player good
i could also base it on the fact that i have only seen 1 naga user top any charts in any of the hundreds of raids i ran
the problem is reliance and conditioning, lets say you buy a naga and get used to the button macros and it makes your gameplay better a little bit (or a lot depending on your starting skill level), but then you go to use another computer, one with a standard keyboard and standard 5 button mouse, well now you are screwed, without your extra buttons you can't play as well as you would on your home computer, thus making you worse as a player
the excuse of "well i will take my mouse everywhere" or "i don't play on other computers" doesn't change the fact that without the naga you are worthless as a player
learn to play well with a standard config and you can excel on any computer, limit yourself, and you are only as you were before you bought the naga (or worse)
so yes. naga owners are bad players, not because they are bad as a person, but because their reliance on the naga holds them back