Straight woman/men liking gay people

How do you guys feel about that?? Me personally, if I discover that somebody is gay, I respect them and be on my way. But I’ve seen a lot of people saying like “Oh if only he/she wasn’t gay!” “I was a female/male..” Like how does people just continuing liking somebody despite knowing that they’re attracted to the opposite gender, I’m not judging I just find it strange is all