[quote name='dlloyd' timestamp='1473372529' post='3129666']
Yes. If reading music somehow interferes with the groove, it's because you suck at reading.
[/quote]
As a non-reader myself I'm quite happy to be told that this is the case, but for yer average pub rock band (like wot I play in mainly) there's more to it than the musical groove.
It's essential to interact with your fellow band members, and with the audience, and to appear to be having a great time even if you're not.
Eyes and teeth, boys, eye and teeth!
If we all spend the gig either staring at our fretting hand or - even worse - staring at bits of paper, then no one will be listening to our groove. They will, quite rightly, assume that we are as dull as we look and take their custom elsewhere.
YMMV of course.