Static typing buys you correctness now. Go isn't really a poster child of language design, to be blunt - but it's better to find out now rather than in production.
Compiled code is also significantly faster in many cases.
i see your point and i know OP asked about why Go instead of python, but having a statically typed language isn't limited to only Go. you could replace everything you wrote with Java/C++/C# and still have a similar answer (minus language design i guess which is a different argument)
Compiled code is also significantly faster in many cases.