Nobody who has hunted big game for any length of time would suggest that scent and wind direction don't matter, unless of course they prefer "tag soup." I have countless examples of being scented by game hundreds of yards away. Just my opinion based on my experiences.
My hunting experience realy realy pales to you experience.
There are thousands of variables to hunting.
The main thing I have learned is that as soon as you say an animal always will, it won't. As soon as you say an animal never will, they will.
Was leaving the bush from turkey hinting and decided to take a piss near a fence line. Heard a noise behind me. When I turned around I locked eyes with a decent doe. It jumped the fence, now it was within 6 feet. Looked at me once more and began trotting down the trail I just came from.
I swear I could hear it laughing as it went!