I'm not opposed to waiting out weak attacks for a brief moment, but even those must be terminated. A drunk guy who can barely stand can still fall into me and knock me down, hitting my head on the way down. That's no better for me than getting hit while standing. Mind you, it won't take much to take that drunk guy down, so I probably won't have to hurt him. The post I replied to talked about spending minutes defending, rather than ending the engagement. That's a poor choice, in my opinion.If you play defense and not hitting back but your opponent still wants to attack you, it will give you a good reason to hurt him and you don't have to feel bad about it. You can always test your defense skill first and then test your offense skill afterward.
Is that what self-defense is about? You don't want to hurt your opponent unless your opponent deserves to be hurt
EDIT: I don't draw a line between "defensive skill" and "offensive skill". Blocks and blending should flow directly into strikes, locks, and throws. Oh, and I don't test my skills on the street. That's what the dojo is for. Testing them on the street requires the arrogance of assumed functional invincibility, or simply not knowing (or caring) about the potential consequences.