hmmm...a gay couple putting their child in a situation like that where that child could be ridiculed, and/or is forced to constantly defend their parents doesn't sound like a good thing for a child to start with.
You raise good questions of logic. Logic, of course, often has no place in issues regarding human behavior. And lesbionic behavior, well... But let's pretend, since I haven't seen all the facts yet, just that video clip.
I've known parents who've sent their children to RCC schools to get a "better" education, believing their own local public schools to be inferior. I'm not sure about Denver, Colorado, maybe this school was just physically closer for this preschooler, or whether the other preschool options were very bad.
Second, some parents, even lesbians, want to raise their children as Catholics. The RCC itself encourages Catholic parents to send their children to Church schools rather than public, as they did when I was school age. In fact, in Catholic school we were told not to associate with public school students outside of class, who might be sinful Protestants, or even, God forbid, Jews. That was actually taught to us.
If I had school-age children again (as I did twice), I'd send them to whatever school offered them a good total education. In the US Army, and moving around a great deal, sometimes that meant a post-provided preschool, other times a public school. I never really had a good private school option.
And I not only attended all the parent-teacher conferences, but picked up my sons whenever I could, or else my wife did, and spoke with the teacher regularly. And frankly, sometimes I "snooped" around the school (after signing in), and in that way learned my oldest son wasn't adapting well to being relocated to so many different schools in a very short time, because of my Army career.
And so I had him evaluated by a child psychologist, who identified me as part of the problem, and not long afterwards retired. My health was already failing, yet I could have stayed on active duty a little longer, but at his expense. So I retired and spent much of my new free time with him, as the doctor prescribed.
So Doug, parents will often do things they think are for the good of their children, even if it's not readily apparent to outsiders. Was that the case here? I can't say, but I consider it possible. Myself, I'd never send a child to an RCC school, which is as much indoctrination as education, like many religious schools. But maybe these parents were focused on the education part, and thought a preschooler couldn't be harmed, intending to put her in public school eventually. I'd like to hear or read an interview with them.