Today, I would definitely choose rust over go. And I lament that so much container software uses go rather than rust. But back when docker started rust was a lot less mature and probably wouldn't have been a good choice.

Go has grown too, since 1.25 it knows it’s in a container, uses all cores on CPU for go routines without hiccup.

C was and is a good choice for that kind of software. I don't understand the prevalence of Go in these tools.