I'll say it again: Go doesn't have generics because of implementation complexity. The tradeoff was against the additional complexity that our users would have to deal with.
you see, the problem with the complexity of a language isnt real. it is perfectly possible to avoid generics in c++ forever. but there will come a day when you think to yourself, was it really worth it to be this lazy? then you take a peek and (assuming you understand generics by then enough to use it a little) suddenly half of what you have writen so far is for the bin.