Honestly, I don't believe that you think it is wrong to judge other people's cultures and value systems. I believe you are confused, and you know that there are adages that say "don't judge," and you haven't stopped to think about whether those adages make sense. If you did believe what you're saying, you'd be one of the people who come in here and say, "I can't believe that MMM would say that spending money is a bad idea and is likely to make me less happy."
Because that is exactly what this site's founder does in most of his articles. He makes a value judgment and says, "This is better than that." Not in the sense of being intrinsically better in a spiritual/moral sense. But in a sense of "likely to improve the happiness of a human being." Who, after all, all come from the same evolutionary-psychological origin.
We humans aren't all the same, but we're similar. Most of us want shelter, food, companionship, free-time, self-actualization. I'm sure you can find someone who would enjoy being starved to death. But most people want food. I'm sure you could find someone who enjoys being shackled to the office fourteen hours a day until the boss decides to go home. But most do not, and culture doesn't really change that so much. If a culture enables its more powerful members to starve people to death, I'm gonna call that out. Same with one that encourages widespread overwork.
The truth of what I'm saying is clearly indicated by numerous studies showing that the Japanese are the least happy bunch of industrialized people in the entire world.