And he actually watches film and studies defensive schemes, understands offensive play design, leverage, route adjustments, etc. Which is what the WRs do also, so they're on the same page.
Unlike Murray, who's so "gifted" that he doesn't need to watch much film or break down opponents. He "sees so much in his head" - but the WRs are not in his head, so nobody has any idea what he sees or what he's going to do on any given play.
Hence why Murray's most successful plays are broken plays outside the scheme of the offense, but Brissett makes the scheme look competent and effective.