You must live in a very dangerous area!
You never know what you're going to run into or where you need to go. You leave the yard or get off pavement much you're going to be poking through blackberry brambles, multiflora rose and/or mud and I want boots for that. Just the other day I had the dogs out for a walk around town when a dog came barreling out of somebody's back yard and went after my dog. A swift kick to the ribs changed his mind. I doubt it would have been near as effective with sandals.
This is what most of my yard looks like. I go where I want in it, barefoot, sandals, boots, romeos, whatever I happen to be wearing. I worry not about a dog attacking my or my dogs, I'll kick them with whatever I should happen to be wearing, or I have an item accessible (even in town) that is much more effective than a pair of Red Wings.
Wife and I took the dogs up this road, it's no longer got snow on it, yesterday a mile or so to the next section gate. Was talking to the rancher neighbor who moved his cows onto this allotment yesterday after we got home, and while he was up in the area of that gate working fence in preparation for moving the cows on, heard something move behind him only to see a lion skittering away. I have more to worry about with coyotes and lions than I do with dogs and therefor prepare more for them and other possibilities. I've walked up that road barefoot, sandals, boots, LL Bean Mainers, haven't had to use snowshoes yet. And yes, I've walked through sagebrush grasslands more than once barefoot or in moccasins. If I run across a berry patch, or roses, or chaparral that I absolutely have to go through rather than around, I'll take responsibility for poor planning, or I go get proper equipment. I've yet to have anyone chase me through them attempting to take my life. We'll have a shootout before that happens.