I’m exceptionally strong; I can do things that would kill an average person. I’m not a trained fighter though. Put me in a fight against another untrained person of average strength and I’m going to wipe the floor with him. Literally. It’s like playing with a child. There won’t be any technique involved, just brute strength.
However, against a trained fighter, I’d be done in less than minute, strength be damned. They’ll do things to me I’ve only seen on TV.
That being said, being big and strong tends to do a couple things in public. Either everyone wants to be my friend, or some jackass wants to try to prove something while walking through a crowd. A good hard shoulder into theirs usually knocks them sideways enough that they keep walking and never look back.