i'll handle this one, bobby boy.
when someone is offering wedding services, anyone with enough money may "force" them into serving them by giving them money.
that's kinda the idea of how a business works. funny enough, the people offering the services in exchange for money don't call it being "forced", they call it being paid. so i'm not sure why you use that word "force". no one forced them to open a wedding services business.
gays have just as much "right" to expect to be able to pay for services being offered as a straight couple does, this originates out of "civil rights" and "equal protection of the law", which is somewhere in the constitution.
does that help, bobby?