And yet when NASA went to the moon, they had telemetry data.
NASA couldn't obtain that same data locally, they had to know how the vehicle and software behaved in the real situation. NASA's telemetry also ran on their own hardware, not on arbitrary users'.
Contrast that to Go, which is used in real situations internally at Google. They don't need to spy on their users, they have first hand experience using the tool.
And that’s a big disadvantage if I were to scale the usage of Go then I would say startups and middle orgs occupies like 80% if the Go team work according to logic at google scale, Go wouldn’t be this successful