Who cares honestly. I'd be willing to bet a lot of money that you aren't in a top guild. I'd be willing to bet that you don't have top hard mode gear. I'd be willing to bet that you aren't competing against people with top hard mode gear.
Bottom line - Guilds take spriests...all the time. Just like GC said. Yes, even top progression guilds.
As for you and I? If your guild has an issue with taking an spriest to a raid, that priest is either a bad player or nobody likes him. Or it's a chick and gets pissed when 24 guys are joking around.
edit: sorry Spiritus, this was directed at the OP, not you.