What you described was not the actual outcome of the ruling.
The wedding website designer did not give them a website with no mention of being gay, that they could fill in themselves. The website designer was allowed to fully refuse them any kind of website at all. Just like refusing a blank wedding cake because the couple is gay.
The justification of the decision was not in good faith. It stepped away over the bounds of protecting against compelled speech. And they deserve to feel the consequences.