I agree that it's not good to be a maniac. I also agree that for the Internet, there's no use in calibrating if your monitor is not too far off that is.
But I don't agree when it's for yourself. The closer what you see on your screen matched your scanned original on one side, and your print on the other side, the better.
Getting a profile for your priter with the paper you fancy is not that expensive. Here, several photography shops offer that service.

But it's true that "perfect" calibration only makes sense in the world of offset-printers and designers who have to make shure what they create will also be what is printed after having been digested by several different computers.

There are no Borg. All resistance is fertile.