That's like saying "C is at least as good as C#".
IMHO, your bias is showing.
Good analogy. C# has a lot of useful, fancy features that save you having to code them yourself in straight C. Would I claim that C is at least as good as C#? Depends on what you're doing.
If C# were significantly better than C, overall, wouldn't C have died out long ago, replaced by C#? To the best of my knowledge, straight C can still claim more programmers than any of the more featured variants. That's after roughly 40 years of people inventing "better" languages and trying to pit them against straight C.
Yes, I'm biased, as I state on my FR Profile page: "OS-wise I'm more of a Unix-head than anything else." After 40 years, it's still demonstrably the right way to do most OS-related things. Not everything. Most OS-related things.