Winsock was included with 95 so they had networking available by default. And network has been in Windows since 3.1 so I wouldn't say it was a lack of forethoug

Winsock was included with 95 so they had networking available by default. And network has been in Windows since 3.1 so I wouldn't say it was a lack of forethought. They just did not practice basic security and left it to the rest of the world to protect themselves.