You can have a character who is a good guy for the sake of being a good guy but still give him more meaning. I think Zidane did a good job of that. Zidane is just a good guy, but he has character and he has heart.

I think to give a real world example of what Wolf is talking about, unless I misunderstand him, is that good people have a reason for being good. I have always gone out of my way to help others, to give back when I can, to volunteer, to donate money, to donate food, to put someone up when they need it, etc etc, (heck if someone asked me for a kidney I would have a hard time saying no even if I had never met them) because I want to be a good person and do good things for others. But I didn't magically wake up one day and say "Gee, I'm going to do all of this." It came from having a crap life and not wanting anyone else to ever have to feel the way I've felt. Sure some of it is probably just how my brain works, I have a really high sense of empathy which also helped push it forward, but it came from somewhere.

I think what he's saying is its great to have characters like that, but show us why they're like that. Show us what made them that way, even if its just growing up in a strong environment with plenty of support and having been raised to care about others.

Also give them some depth because everyone has faults and everyone has struggles. Making a character like that makes them more relateable and believable and makes for a stronger character