"...I got really annoyed when reading people's papers in school..." MSGT9410, good for you. It's nice to hear from a high school student who knows that proper spelling and grammar is important. The Queen's English gets raped on every forum I post on. Makes me crazy. Using proper spelling and grammar gives credibility. Improper use of the Queen's English makes you look like an illterate twit. If your teachers accept papers with 'u', 'lol', etc, they should be fired.
"...in place of too, to, and so on..." However, it's to, too and two. Not 'and so on'. Sorry, I'm on your side completely, but just couldn't resist it. Snicker.
As to the question at hand, there's no question that a scope allows you to see your target better and, therefore, allows you to place your shot better. And there's also no question that the cost of a good scope has come way down while the quality of the optics has gone way up. Old eyes, hunting at dusk or dawn, some long range shooting matches, sure, but not every rifle needs a telescopic sight.
I really don't understand why anybody would want to scope an SKS, an M1 Carbine or any other carbine. Screws up the balance. Screws up the balance on most milsurp rifles, ruins their value and most of 'em just aren't meant to have scopes. Why buy an as issued No. 4 Lee-Enfield, K98 or 1903A3 if you want a scoped rifle? Or spend the money for a sniper version of a milsurp.