Strongly disagree with that statement...
I train 4 days a weeks with a split routine at the moment, but before the start of the footy season I trained the 5 big lifts (squat/bench/dead/MP/BOR) 3 times a week, 5 sets of each for 5 reps, as heavy as you could go..
Same exact exercises 3 days a week, longest break between sessions would be 2 days, normally 1. Some days you'd still feel a bit sore, but could always push, at the very least, the same as you did in the session before once you got going. Increased weights on all 5 exercises every week for the ~3 months I was doing it.
As long as you're eating/sleeping enough to recover, you can't go wrong