exactly, which means you treat all the same, which means a specialized day is to treat someone different.
You seem very misinformed about Gay Days. Disney, as a company, does NOT specifically celebrate Gay Days with anything special in the parks,nor do they sponsor it. They are normal park operating days. It has only been the last couple of years where the company has even been offering any rainbow themed merchandise on site. In fact, for the first few years, Disney went so far as to put out disclaimer signs at the parks, and letters in the resort rooms.
HOWEVER, it hasn't been too many years since Disney DID promote and sell special tickets for Night of Joy, a Christian music celebration in the parks, which has been discontinued. As far as Gay Day private ticket events, they are not Disney promoting, you can't buy the tickets through Disney. The history of Gay Day may surprise those thinking that DIsney sponsors the event. It started as a group of internet friends meeting up in the park wearing red shirts...that was it, and as things tend to do on the internet, it grew and grew to what we see today. Still basically a group of people who have decided to all visit Disney at the same time. Just as any other group is welcome to do and many DO, from churches, schools, groups of employees from major corporations and non-profit organizations. You'll see LOTS of people wearing shirts from specific groups ANYTIME you visit Disney.
Promoters rent certain venues, like Typhoon Lagoon for a private party... the promoter sells the tickets...like any other private corporate event.
Everyone is welcome at Gay Days, again, there is no special events during park operating hours, it's like any other day in the parks. I went a few years ago with with a group of 16 people, I was the only gay person in the group. The group was all ages, from a few months to mid-60s. We all went to MK that day, and everyone enjoyed it. That said, we didn't wander through the park as a huge group, we broke into sub-groups of 4 to 6 people, so it wasn't like herding cats.