In reality sometimes people can get the jump on you..
Sometimes there's no escape
Sometimes escape is not an option. One day my wife and I were walking in our neighborhood and a car rode up on us in a strange way. I told my wife that if they get out and come to us, then run home and call the police while I stay there and fight it out. I can out run my wife but in that situation I wouldn't. Thankfully the car was just the neighbors teens. I'm not sure if they were aware of what they did or if they were trying to scare us. I just knew from past neighborhoods I've lived and worked in, that it's not normal to ride up on people like that.
In the past my wife has been stalked by someone in the car. I didn't know how many people would jump out the car or if they would have guns. I just knew I couldn't run. Escape wasn't an option at least not before my wife was safe. 1, 2, or 5. Whoever jumped out of the car I knew it would be me by myself until my wife could get help.
If two people were attacking one of your family members. Would sit back and watch, pull out your phone and video tape, stand on the side and try to talk them out of it. I don't know what your physical abilities are now, but my abilities are still decent, so I know I would still be willing to get into it with multiple attackers. If it's just then may yes or maybe know. It just depends if I get caught off guard, by myself, or have to protect someone.