I don't think the claim is that Python is a good replacement for C. But there are probably more (business) problems for which Python is the right tool to solve

I don't think the claim is that Python is a good replacement for C. But there are probably more (business) problems for which Python is the right tool to solve it then problems for which C is the right tool. C is also a lot harder than Python to learn. So for these reasons there are more Python programmers than C programmers. For some subset of problems for which C is a good tool, Rust is a good alternative, arguably with less foot guns. For some other problems that are solved with C, Golang is a good alternative. So in the end C is losing marketshare because of all these reasons.