this is false... i dont know where you are getting this from...
feet flat, yes
but the back should be arched... it does not have to be extreme, but not many competitive powerlifters are going to agree with you on this... and powerlifting is the only sport i know of where the bench press is an event...
I wasn't speaking about power lifting. Them guys get injured all the time for a reason. Its hard to crank out 1 rep maxes with perfect form
The question was asked about the "correct" way to perform the exercise, which also means avoiding arching the back during the lift. Form is something that should be important to everyone, but unfortunately isn't.