The r3ason pro style is what it is.,is because it assumes the talent I the other side is as good or better. A spread is predicated on a college trams 3rd 4th 5th dB being ess athletic than your 4/5 wr's.
It also is designed to create space so a rb is facing less lbers and more dbs which are smaller. Hopes to get 1 on 1 match ups and have your better athlete win. I don't know who you are listening to about this,would like to know

Pro style is about adaption during a play to negate athletes and take advantage of any leverage and timing that a lesser athlete doesn't been to complete a play based on geometry and physics.