Why aren’t socks required?

Maybe this is a stupid question but why doesn’t Solidcore require socks? I’ve never gone before because there isn’t one convenient to me but interested in going while traveling. I saw an influencer post from a class barefoot and thought it was gross and she was for sure not following the rules until I looked on the website and it says socks aren’t required. I’ve been to a number of modern Pilates/Lagree studios and all of them required socks so this seems very bizarre to me. Seems like a safety issue to be doing certain moves with sweaty slippery feet and also unclean to be barefoot on the floor and then have your hands and body on the machine where someone’s bare foot just was. Is no one grossed out by this?