Sorry but no, this is totally wrong. There is no set of compiler flags or design practices that can fix the lack of lifetime analysis in C.
I do actually think that with modern C++ it's possible to get to a style of programming where memory unsafety is mostly a theoretical concern but not with C.
It is true that you will not get full lifetime analysis with a C compiler, I do not think this defeats my point. (and you can get lifetime analysis with other tools, but we lack good tooling for this)
For me, memory safety is also mostly a theoretical concern in C. This is achieved by having proper abstractions instead of low-level pointer fiddling and by having a clear strategy for managing lifetimes.
I do actually think that with modern C++ it's possible to get to a style of programming where memory unsafety is mostly a theoretical concern but not with C.