No I understand man, I wasn't trying to come off like I was saying you're wrong. Sorry if I did. I was meaning that's just how I prefer it because my paper cutter is a piece of shit lol.
I'm not going to even try to tell anyone that their method of cutting paper is wrong. It's just whatever works best for thy individual.
No, I didn't take it that way, I was just clarifying.
I only mentioned it because at one point in time, someone told me (honestly don't remember who) that they didn't get straight cuts with a paper cutter. The solution is pretty simple. Get a better paper cutter.

The same thing would happen if you bought a shitty straight edge that was bent or warped or if you weren't using a sharp knife. In that case the straight edge/knife method wouldn't give you good cuts either. And again, the solution would be to buy a better straight edge or knife.
When I first started out here, I was printing my covers on cheap copy paper with my old HP printer on standard settings. Needless to say, those covers looked like crap. I also used my wife's old paper cutter from her scrap book room. This thing was old and had a $0.50 price tag from an old garage sale. This blade was so dull, it would tear the paper more than cut it. So then I had crappy quality paper and prints with torn edges. It didn't take long for me to start buying some good quality paper, along with a new printer and of course a new paper cutter with replaceable blades. And now I'm finally caught up with 100% of my game collection (approx. 1,300 games) in either their original cases or some type of custom case and cover.