The fishes are also employed for the same purpose on any yard, which happens to be sprung or fractured. Thus their form, application, and utility are exactly like those of the splinters applied to a broken limb in surgery.
Religious institutions should have religious freedom on this issue. No church or minister should ever have to conduct a marriage that is inconsistent with their religious beliefs. But I think as a civil institution, this issue's time has come and we need to move forward.
Maybe it is worth investigating the unknown, if only because the very feeling of not knowing is a painful one.