I agree with the whole idea of sub-maximal loads, most novice programs incorporate this. The real question is which way is more effective 3x5 at 85%, 5x5 at 70% or 5x10 at 60%? If you are trying to develop maximal strength, you will eventually have to lift at high % of your 1RM to make adaptations. Doing 5x10 at 60% of your 1rm becomes more a hypertrophy workout. Benching that gives a similar load as a push up, and with that mentality, you might as well not bench. The reason why the barbell lifts are superior for strength training is because they can be loaded much heavier and over a longer period. Plyos are important, but a plyos mean nothing if you are weak. What are you going to do, "explosively" bench 85 pounds? lol
I agreed with a lot about what he said, but he said that if your squat goes up your vertical will go down, which is fucking bullshit. Of course there is a point of diminishing returns, but if you go from a novice level squat to an intermediate level squat, its going to translate to more power. Yeah if a guy already squats 600 then gets to 700, there isn't going to be much of an improvement in vertical, but that only applies to a very small percentage of the elite level lifters.
If you are born with a shit vertical, there isn't much you can do about it, however to say that the KING of Strength exercises will make you weaker at an essential and translatable movement like the vertical jump simply is not true.