I think you may well be right, I've never ever seen dogs being aggresive on parks or woods around here. I wouldn't say the owners are all good but they obviously can't be that bad.

You do get the typical black Lab owners whose dogs follow you for half a mile while you listen to their owner repeating their name over and over and over, while they follow you. Dur!!!

I would rather have my dog muzzled and defend the dog myself than have a full on fight on my hands.