while I find that a very extreme case, but to each needs their own, but you can also finger swipe to turn pages.
when I'm holding mine one handed on the subway my four fingers are in the middle of the back of the nook and my thumb is between the page forward and backwards and makes it very easy to turn pages either way.
Do you really think the Nook is heavy? Again to each their own, but Really? I mean the Ipad is heavy for long durations but the nook, come on

the girls at work think it's very lightweight and love how the back kind of concaves in with the rubberized back for easy holding.
I don't know but I guess everyone's needs and such are different.
I hope you find the right one for you