Why Would You Trim a Card?

Doesn't everyone like soft corners and fuzzy borders? 

I picked up this Ray Sadecki online for a little bit of online currency, and when it arrived it just seemed a bit off. Physically altering cards (and not in the good way) seems to be in the news a lot lately, hopefully finally exposing the whole "grading" thing as the sham that I've always felt it was.

This card takes up less space than a modern card (not as wide), which could also be the result of some sort of factory cutting error. But with all of the dirty business going on, I was quickly supicious of the card.

This card in any condition isn't really worth all that much, which makes this even stranger. Do we have people going through boxes of low series vintage commons now with their super laser box cutters? I am definitely not mad at owning this particular copy of this particular card, or really accusing anyone specific of wrongdoing. Who can say what really happened here? It just seems really fishy, and I would rather the card was left alone.