What does 1 Chronicles 18:17 mean?

Benaiah, Jehoiada's son, was in charge of David's personal guards. David's sons worked alongside him as top officials, but they weren't priests. 1 Chronicles 18:17 - Modern Text Bible

(This verse lists David's key leaders. Benaiah led the elite bodyguards, and David's sons held high-ranking positions, but the word 'priests' here means they served in important roles, not religious ones.)