Like this post?
the "only" thing shoes might help with is if the blades kicked up a rock and it hit your foot, it might, just might prevent an injury but otherwse shoes are no help.
when I was stationed in England, I had one of those push mowers with the blades attached to the wheels, it was great to use because it didn't cost anything to operate and I always did it barefoot. as rugged soles said, the green grass stains are a plus.
"Reality is merely an illusion, albeit a very persistent one." Albert Einstein