My takeaway is that these big deer are not really "smarter," they just have a different nature. If something seems off, they'll just slink through cover or turn around in the other direction. And, this is precisely why they've grown to be mature. Of course, every now and then you'll get one that just charges in, totally unconcerned with anything except breeding. But I think these cases are exceptions to the rule. Be thankful when you get to hunt a deer like this because he'll be the easiest big buck you'll ever kill.