They also tried to remove wrestling as an olympic sport although it is not nearly as judging intensive as boxing.
I suspect there are political motivations for it.
The type of personalities associated with boxing and wrestling might be described as representing a "rugged individual" demographic. They're individuals like Conor McGregor who went from being on state welfare to becoming a multi millionaire within 5 years. These are the types of personalities sports like boxing and wrestling produce. The value system of boxing/wrestling is if someone works hard and can outsmart their opponents there is little limit to what they can achieve in life.
All of the perspectives and values I mentioned could clash with modern day political rhetoric. And perhaps that is the real reason behind campaigns to remove sports like boxing and wrestling from the olympics.