They have already created gender neutral restrooms, according to the article these windows are not in those.
There’s 2 stalls visible in the picture. The walls are not floor to ceiling, the doors have larger gaps above and though it isn’t visible, I expect also a gap below. It’s not clear if there are vertical visibility slits on the sides of the doors. But they’re clearly just stalls really.
But it doesn’t really matter how the stalls are, the way that we know that this is targeted spite and bullying, is that windows are being cut only in a specific subset of the restrooms. They’re trying to shame and intimidate the kids that are in those restrooms.
I’ve stopped giving USA republicans the benefit of doubt years ago, Trump’s first year in office was enough to convince me. I’ve accepted that they are comically evil and that they have no redeeming qualities. So if I see something that is comically evil, then I’m not going to invent possibilities of why it might not be as bad, because in my experience it will turn out that after a little digging, it’s actually worse.
Also the administration was given the opportunity to justify or explain their actions by the reporter, and they chose not to, most likely not because they didn’t want to, but because they couldn’t do so in a matter that did not make them appear like spiteful bigots. There’s no point in inventing possible defenses for them if they could not provide them themselves.