What is the big deal about everybody taking their shoes off in s

Wildwood - What is the big deal about everybody taking their shoes off in side. My mother would have snaked if I had my smelly old sneakers on the floor of the living room. They ask humans to take their shoes off and then bring their dogs inside after walking on the sidewalks. It makes no sense. Wipe your feet at the door mat and keep your feet on the floor and not on furniture.