I know that the primary focus of Hero's Network isn't homeless outreach. As I understand it, that simply means that most of the HN members doesn't go on patrols for helping homeless people. I think that's fine. Everyone should choose their own missions.
I'd like to encourage you to donate to HOPE 2013 anyway though. It doesn't require you to go on an actual homeless outreach. But if you can spare $5 or $10, it would make a difference.