If it's a post made from the states, for some reason there are places in the states where it is normal to wear shoes in the house. I'm gonna assume it probably somewhat correlates to a similar region as the ones where house scorpions are a possible pest.
No house scorpions where I grew up, and I've always been a shoes off immediately inside person, but mental illness always dictated that my mother wear shoes all day every day in the deep south. She had the fungal toenails to prove it >_>
Unfortunately my mom has it as well, without the shoes on in the house as a trigger/assist. But she did work on her feet in shoes, so probably same deal ultimately. It was apparently exacerbated by something being off about her stride. I think she puts too much pressure on the inward side of her feet, or something like that.
Every 5 years or so she has to go in and get it cleaned up, it sounds incredibly painful. I think she had the fungus before she worked too though, it runs in her family. So far none of my siblings got it though. But my sisters have the same stride problem, so hopefully they can otherwise stave it off.
I wear sandals or slippers indoors because I hate the texture of my carpet and can't afford to replace it. I hate how socks feel as well, so those don't get worn unless I'm going somewhere.
People in the US generally wear shoes in their homes. When they come home, they might take off their shoes if the shoes are uncomfortable, in the same way they might remove a bra or a tie, but it’s more for reasons of comfort rather than hygiene or preserving flooring. Guests are usually allowed to keep their shoes on.
In households of people who have recently immigrated, it’s different. It can also be a thing with people whose homes have a high aesthetic value. In general though, in the US it’s expected that the host requests that the guests remove their shoes, rather than it being a presumption.