Your argument is sound for objective gametypes, where kills aren't what directly contributes to your team score. But for slayer K/D is very important.
Which part are you saying is wrong?
Where you said K/D is important. Got to head to class noe but I will explain why later if you would like.
But it undeniably is important. See, you win team slayer when your team has more kills than deaths. Therefore, if you personally have more kills than deaths, it increases your teams chances of winning. And, here's the big one, if everyone on your team has more kills than deaths, then you can't lose! And I know your argument will be "some guy went 10-15 but had 12 assists, so he's good!" but you're assuming that other people on your team couldn't have gotten those kills without those assists, and that assumption is not necessarily true. Everything I said is undeniably true.
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