The entangled fight can look many different ways. It can be a pure empty hand situation where the good guy may use grappling controls to subdue a bad guy with no injuries to either side. It may be a good guy using specific techniques to stop an attacker like the Daniel Penny subway incident. It may involve a lot of striking, or it may involve weapons, on either the good guy, bad guy or both parts. 

One often overlooked area is being attacked where you either don’t have  a weapon or are not able to access it in time, and you have to deal with the bad guy’s weapon. 

Having a skillset where you can prevent the weapon from being used and even taking it away and using it yourself can be categorized as a good thing. Here is a wonderful case in point: 

https://www.wdsu.com/article/louisiana-sex-offender-stabbed-killed-laundromat/60078646