I think Blue sees the point that the reason Humanist celebrants exclude couples wanting holy matrimony are in the same category as why some priests exclude same sex couples and that is why the law is as it is.
Yes there are priests whose motivation is homophobia and priests who observe the scriptural definition.
As there will be Humanist celebrants who are motivated by their beliefs and those motivated by religious persecution.
You're getting silly now, Vlad: it is you who is making a category error here. In effect you're proposing the equivalent of someone who has a leaky tap but decides to approach a bus driver about doing the repair rather than approach a plumber - I can't imagine many would be that stupid.
Those expressly wanting a religious wedding would, I suspect, not try to engage a Humanist celebrant since, by definition, a Humanist celebrant would not be qualified to conduct a religious marriage service, and I'd imagine that any Humanist celebrant who was asked to conduct some "holy matrimony" would, after they had stopped laughing, advise the enquirer to approach a qualified cleric. By the same token I'd be surprised if someone wanting a Humanist wedding would first try to engage their local minister or priest, and if they did I'd imagine that the cleric involved, who no doubt would also have a wee chuckle to themselves, would direct them to the nearest specialist Humanist celebrant.
The relevant issue as, regards the topic of this thread, is whether Humanist celebrants would feel justified in denying their marital services to same-sex couples purely on the basis that they were same-sex couples - and if they did, then they would be just as homophobic as it seems your church is.