why does the @ operator have a lower precedence than |?

I discovered the @ operator today after over a year of rust, and I was initially very happy and pleased until I tried it out:

fn main() {
    match 1 {
        num @ 1 | 2 => {
            println!("{}", num);
        }
        _ => {}
    }
}

yields

error[E0408]: variable `num` is not bound in all patterns
 --> src/main.rs:3:19
  |
3 |         num @ 1 | 2 => {
  |         ---       ^ pattern doesn't bind `num`
  |         |
  |         variable not in all patterns

I was dumbstruck. this was a complete dealbreaker for me, and I may be missing something, but I feel like this error could be done away with if the @ operator had a higher precedence than |.