If you're going to consider unsafe blocks in other libraries (and especially the standard library) as just as "bad" as ones in your own, you have to include the compiler itself too ("oh your compiler generates machine code, that's unsafe!!!"). This logic of course applies to every language, as everything bottoms out in machine code/hardware, and thus it is a fairly uninteresting point.

The power of Rust is the ability to wrap dangerous code into safe abstractions without cost, and unsafe blocks are essentially a flag for "this is dangerous, make sure it's contained".