I've always understood in a band setup you want to avoid everyone fighting over the same frequency range.
But the common guitar chord voicings mean you are playing notes in the range E2-G4 which covers pretty much the entire male vocal range and a lot of the female tessitura.
Does this mean a singer songwriter type performer should seek to find chord voicings that don't overlap the vocal melody in order to keep the vocal crisper in the mix? I rarely see this happen so do different rules apply here?