> Everything you say about memory safety issues applies to logic bugs too.

It doesn't, because logic bugs generally have, or can be made to have limited scope.

> And likewise in reverse - you can have a memory safety issue that doesn't result in a vulnerability or crash.

No you can't, not in standard C. Any case of memory unsafety is undefined behaviour, therefore a conforming implementation may implement it as a vulnerability and/or crash. (You can have a memory safety issue that happens to not result in a vulnerability or crash in the current version of gcc/clang, but that's a lot less reassuring)