Scope a light handy .30-30 carbine? I wouldn't think of it. Sort of wrecks the whole dynamic.
"Need" a scope? Bah! My aging eyeballs are as bad as anyone's, and worse than most and I have iron sights on all my hunting rifles (aperture sights that is), and also employ some simple tricks that keep me in the iron sight game. Run the problem past your optometrist the next time he has you in his chair.