The problem with responses like these is that they're very much bullshit. If they just said, "we like it, and we're too lazy", that'd be much more honest. Google Analytics doesn't do anything that other kinds of tracking couldn't do.
So, in a nutshell, these folks are basically saying that analytics are so important that they outweigh the intrusion, but they're not important enough to implement their own analytics.
But most importantly and unlike many (most?) open source projects, it was made without regards for whether others feel strongly enough to offer to do the work. "I don't want to do it" in many projects can be answered with, "if you don't want to do it, I'll do it." That's not an option here, and that's why I think the response is bullshit.
"As for Go itself, there is no tracking per se but the go command does by default connect to a Google-run module proxy and checksum database, as is noted on the home page below the download button as well as at the top of https://go.dev/dl/. That page in turn links to https://proxy.golang.org/privacy, which explains exactly what information is and is not collected, and for how long"
