96 percent of the time you have KK, you won't be up against AA. The 4 percent of the time you're up against AA
while that sounds very nice, it's forgetting something...

we are not talking about one random hand out of that 100.

we are talking about the hand that your reraised all in on.

do you think that there is just a 4% chance that your against AA the time your 5xBB bet is reraised all in? ... we all know better than that...

does that mean you should fold KK everytime someone goes all in? No.
does that mean that you should call everytime someone someone goes all-in? No.

It's actually fairly useless information... what is useful is: "will this player go all in with less than AA?"

I know players I would fold KK without a second though if they reriase all in... I also know players I wouldnt fold TT to if they went all in.