I bought a new bike & the wheel looked straight up & down, but it was obviously left of
center in the fork. The salespeople said no big deal, so I figured no big deal since I knew nothing.

But I've read that a wheel like that means either my fork is messed up or the wheel isn't
dished properly. I tried putting a fender on the other day, and that was just a joke because the
fender was centered & the tire was off to the left, so there was no way the fender wasn't going
to rub.

Is that true? Is this something I should be concerned with?