While that is true, there are clippy::indexing_slicing, clippy::string_slice for that:

  https://github.com/rust-lang/rust-clippy/issues/8184#issuecomment-1003651774

  error: indexing may panic
     --> src/main.rs:100:57
      |
  100 |             rtmp::header::BasicHeader::ID0 => u32::from(buffer[1]) + 64,
      |                                                         ^^^^^^^^^
      |
      = help: consider using `.get(n)` or `.get_mut(n)` instead
      = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#indexing_slicing