How about a gay male couple? Should a Tux shop be required to rent them matching His and His tuxedos for their wedding?
What if they reserve and present themselves to stay in the Honeymoon Suite at your hotel?
Or a gay or lesbian couple asks an architect, to design their new home. His/His or Her/her bathroom plans.
How about if the walk up to your Uber car holding hands, and kissing? Gotta give them the rise anyway?
Etc.
Different principle at stake there. It's not about selling, it's about making/manufacturing.
If I own a business selling clothes for the general society, I don't care what the sexual orientation is of the people who buy my clothes.
Now if a homosexual couple (it could be any couple) asks me to make a special kind of clothing for them, that would be another issue. I don't have to make anything I don't want to.
Two homosexual men (or women) want to buy some of my regular tuxedos..... no problem. Even if they declare what they're wearing them for.
The issue is a business being forced to MAKE, not SELL, a particular kind of product.