If I understand you correctly, you're saying that putting emphasis on the "Gay" description is reductive?
I don't necessarily disagree, but headlines need to be short, capture attention and accurately summarize the content of the article. I think this headline succeeds in all these aspects.
Also it's worth noting that this cruise was chartered by a company that advertises itself as specialising in gay & LGBTQ+ holiday packages. I doubt anyone taking part in this cruise would object to it being described as gay.
That's a fair point.
I'm still going to celebrate the gays.