People get upset about relatively unimportant things. I'm pretty sure sexism exists and is bad, but this is just... not it. It's a dumb meme, that's all.
It's not really up to you or me to dictate what other people think though, or what they feel is important to them, so the fact you think it's a dumb meme isn't relevant. That's why we have courts.
That's why we have levels of courts and people whose job it is to decide whether or not a case has merit based on arguments brought by interested parties. We can't say something is a waste of time just by looking at it. We can't see the nuance at the heart of every matter.
Again, it's not for you or me to dictate what is actually important. Not important to you is not the same as being objectively unimportant.
Well, apparently not everyone agrees with you. Since you haven't laid out an argument there's not really much ground to see where you and this ruling disagree.