Why are physical defenders like Lu DortJaylen Brown oftentimes allowed to get away with clear fouls

Jaylen Brown with the saucy 3.

Kevin Love sets the hard screen on Jaylen Brown, knocks him over

Full play Max Strus steps on Jaylen Browns head As a response Jaylen grabs Strus' ankle The refs ruled it a common foul on Jaylen Brown

Examples of offensive fouls in the 1970s