OP demonstrated that failing to handle errors does in fact happen in the wild, while in Rust the compiler enforces that you must handle them. The question is whether this difference between the systems has practical implications, and it seems it does. The existence of community idioms that help avoid the problem doesn't change the fact that the languages themselves are meaningfully different.

It happens in personal projects, small teams and big ones too. The linter errors are too often ignored by developers. Also, it should help embrace in developer the need to explicitly name some error to be ignored.