I've never gotten a straight answer as to why Go makes system calls directly instead of doing what every other program on the planet does and calling into the s

I've never gotten a straight answer as to why Go makes system calls directly instead of doing what every other program on the planet does and calling into the system libraries. Certainly, it made the ports to non-Linux systems absolutely brutal: systems are required to make themselves look like Linux for Go to function correctly. So yes, this is unenlightened -- or perhaps it's a conscious attempt to make Go unportable?