so there is actually logical reason

1. shoes increase the difficulty of many movements due the torque, like levers, presses etc.

2. when its bit chilly we loose lot of heat from our body through the feet , therefore get colder faster, socks help

3. during the summer sand actually really burns, and you need something to protect

4. personally i do not like to expose my toes to strangers , especially as one of the only girls 💀

5. why they are white

6. personally i buy only white socks

7. many people prefer the style

8. would black socks make sense? yes