> But single winner ranked choice voting is still important for elected positions that necessarily must be one person, like executive seats.

Executives are neither necessarily single seat nor necessarily directly elected. When indirectly elected, the electoral body that is itself directly elected need not be elected with single-winner methods. The US, in fact, uses multiwinner elections for electing the electoral college now, though mostly using the specific method (multiseat plurality winner-take-all) whose manifest unfairness and utility in excluding minority voices is the specific reason for the existing statutory ban on multiwinner elections for Congress.