Why do you say this? I respect it, I'm just curious.
It signals that the speaker doesn't understand that the two are different languages with very different communities.
I don't really think that C users are entirely immune to dependency hell, if that's what OP meant, though. It is orthogonal.
As a user, I do believe it sucks when you depend on something that is not included by default on all target platforms(and you fail to include it and maintain it within your source tree*).
It is probably true that more average C programs can be built with plain Makefiles or even without a Makefile than C++, though.
You can of course add dependencies on configure scripts, m4, cmake, go, python or rust when building a plain self-contained C program and indeed many do.