In other words, should we use anti-discrimination laws to force Bible-believing churches to host ceremonies that we know they will find morally offensive when we know we could easily find other churches or facilities that would be willing to host the ceremonies?
Nope. You're clearly not following the thread.
And should we use anti-discrimination laws to force Christian photographers to attend and service ceremonies that we know they will find morally offensive when we know we could easily find other photographers who would not mind servicing the ceremonies?
If a photographer is doing business with the public, they should treat all of their customers fairly and equitably. If they can't, they shouldn't be doing business.
If the gay rights crowd would practice a little tolerance and respect, this would not even be an issue. It's not that they "need" to hold their ceremonies in conservative churches or "need" to have Christian photographers service their ceremonies--it's that they want to do so because they want to insult and humiliate conservative Christians.
Gays are looking for no more or less consideration than any black person would be at the Woolworth's lunch counter.
'We don't serve your kind here' isn't an acceptable practice in business for most States. Nor should it be.