Sadly you encountered an idiot(s). I main bard and first thing I do is sing Foes Req even if there aren't any caster dps so the WHM or SCH can dps.
Also, holy is a great defensive skill as its a huge damage, huge AOE stun. Even when I play as a tank I'd rather the WHM get holys in there, especially right after a mass pull for the stun. I'm actually stunned when the WHM does not holy. That actually causes near wipes or wipes.