I have been wearing flip flops (actually, slightly thicker soles with the woven nylon straps) every summer for decades and, I do most farm chores in them. Clean the barn, etc. I don't wear them when using the chain saw or moving heavy machinery, but I have wandered the hay field in them, worn them to mend fences, walked the woods from the house to the hay field, and even to turn wood. I continue to wear them as slippers most of the winter, even for quick trips to the store two miles up the road. Back in my college days often went bare foot for days and built up calluses the extent that I ran two miles every day barefoot. Sandals or flip flops were necessary to enter businesses and go to class. But this week. smooth soled flip flops make it easy to shake off the wood shavings at the shop door.
A few years ago, I was in a farm store and a wayward unsupervised brat quite violently ran a shopping cart into the skid load of 50 lb salt blocks and one fell off landing on my big toe. Broke it, but I was wearing loafers at the time, with flip flops it would have been bad as well.