Homeschooled kids have much more flexible schedules which can allow them to do things in the community during the daytime that are not available to kids who have to go to school in-person full time.
This can include volunteer work or part time jobs working with the public and interacting with people of all ages.
Why do you think you being forced into a monoculture of only kids your own age would help your interaction with others when you're in your 20s? 25 year olds don't behave anything like teenagers.