It's all about the spin. 47% saying someone with religious objections should be required to perform an SSM is shockingly high IMO.
I wouldn't consider issuing a license to be equivalent to officiating at the ceremony. Also, that particular question wasn't about generic somebodies, but about government employees. I say that as one who thinks those clerks ought to find another job if it offends them to issue licenses for SSMs, yet think private individuals shouldn't be forced to provide goods or services intended for use in an SSM ceremony.