Because when golang first came out, it was hyped as a "systems language", and meant to compete with C++. Most people use that term to refer to languages you use

Because when golang first came out, it was hyped as a "systems language", and meant to compete with C++. Most people use that term to refer to languages you use to write kernel level software. Of course, contrary to the golang author's wishes, golang ended up being a competitor to python/nodejs/etc. but it's still the case that the marketing hype from when the language first came out affects what people talk about, even if they don't know the context of why that discussion came about in the first place. Rust on the other hand, is a (somewhat) viable C++ replacement, as can be seen in the projects that get implemented in it (e.g. Rust made its way into the Firefox browser, as well as other low level and speed critical networking projects at different companies).