Cards with a curve/bend

[Jenx34]

As we know older cards often develop a bend to them, especially when stored in boxes. My questions are....

1. Does the bend matter? From a general condition standpoint, is the bend considered a flaw or a negative, or is it ignored?
2. Do the grading companies factor that into their grading?
3. Is it possible to flatten a card by laying it flat and pressing it with something heavy? Would it hurt the card?

I'm attaching a pic of a card I saw (not mine) that got me thinking about this. It seems like the curve is pretty significant, but its hard to tell in pictures.

General thoughts to these questions and anything else pertinent?

note: "Before anyone says all that matters is how it appears to you", I get that. I'm asking how it is perceived more generally within the hobby.