Who takes this kind of argument seriously? The Go community can't support Go without Google because only a company like Google can maintain a linker? You're reaching.
I don't read the comment like that. The original comment invalidates the premise "Go will be maintained in the future, because it is backed by Google". Given how fragile Google's support for non-core projects is, I wouldn't bet on very long term support by Google.
That being said, Go is mainstream enough that, if Google EOLs it, the community will pick up the torch. Simias says its harder for Go than, say, Rust. It probably is.