Sure, if you're in an area where there it close to impossible to avoid on a regular basis it should be the opposite: fight in ways that make you likely to survive long term...

That being said I'll try to clarify a little, my experience is that bringing this attitude on 100% within yourself makes those who're looking for victims shy away. They can "smell" it, that you're not afraid, and also ready to take things to a very serious level right away.

Maybe I've been lucky, maybe I'm delusional, but its worked well so far, and during the past ~3 decades I've only felt like reversing back out of a dodgy alleway once, in downtown Barcelona :-)