If the car was developed and track tested in Japan/UK/on the Nurburgring, it's unlikely that the engineers ever encountered the types of temps we regularly see here in the States.Why Honda released the FK8 with as little cooling capacity as it has is a mystery to us though. I'm sure some engineer somewhere has a reason, good or not who knows.
A very hot day at the Nurburgring is 80F. Same with the UK. Japan can get quite hot in the summer, but if Honda didn't run the car on track there in July or August, it's likely that very little track running was ever done in temps above 80F. At 80F ambient, the stock pads and fluid will give out before the car reaches limp mode from coolant temps.