Exactly, boxing takes the "protect yourself at all times" more seriously, as it's acknowledged if you don't, you probably will get KOd by someone with less scruples.
It's what happened when Mayweather KOd Ortiz
I remember watching that live, but wasn't Floyd pissed about headbutts or hitting on the break? I remember him complaining about some type of fouling saying it's why he did it.