Why are low standards for dps acceptable?

[Kallera]

If the people doing the heavy lifting take on that attitude the boss won't die. Then you can see how much "fun" that is.

All I know is that if I was half the hardass this thread seems to want to promote I'd probably be having a less productive time in the df from trying to make big things out of nothing and leaving in a huff. I make fun of the idea of dps measuring races but the truth is that I find fighting the party more than than the boss a turn off.