Your whole argument seems to be centred around YOU not finding it offensive.
Step out the echo chamber and you’ll find a whole different story.
Trust me, I don’t exist in an LGBTQP+ echo chamber. A point you should consider is that displays of affection which I regularly see happen in the open, are in the open, in front of the culture at large, for anyone and everyone to see.
I don’t find it offensive but the fact that it happens at all is evidence of a lack of danger, or more likely just apathy towards it. Worth remembering too that over 60% of people turned out to vote in favour of gay marriage in the (notoriously catholic, conservative) Republic of Ireland, so hardly just MY echo chamber.