system
Given the following post, respond as if you're commenting on Reddit:
human
[Warhammer 40K] Okay. what's the catch about the Tau?

So far, from what I've seen, they're basically the only sensible people in the entire setting.

What's their dark secret?

For me - loss of culture isn't bad.

What I care for is free will and movement.
gpt
No. You are pretty much right. People like to overemphasize the negative aspects from various bits of lore because everything has to be grim and dark. There is one small, minor race who are not complete dicks.  The Tau.  And yes, their leadership does use some mind control. But the degree to which it is used is wildly overblown. They are not mind controlling everyone all the time, though they probably are using it to control the higher echelons of society.  Which compared to what the other factions do, is still kind and benevolent.  They abhor the kind of pointless slaughter and waste of lives which the Imperium embraces.  the greater good is not simply whatever the ethereals decide, it is as much good for everyone in society as possible. A very utilitarian view. The typical Tau grunt or human worker or soldier anywhere is likely far better off on any Tau World than they would be almost anywhere in the Imperium and has more security and more freedom.  The amount of freedom the typical worker in the Empire has compared to the typical worker in the Imperium would absolutely blow the mind of the average citizen of the Imperium.  Their mind control is used strategically to maintain power, not to turn their entire race into zombies. So long as the job that you want to do needs to be done and you have the skills, you can probably change your job. There are elements of a command economy but it is not actual slavery. The typical member of the empire is just not important enough to ever have their mind messed with.  And the rest of the galaxy is such a tremendously shity place that it very much makes them the good guys.  People dislike the idea of there being any good guys because the setting is grim and dark, there are some good guys.  The Tau.  However, they are a very, very minor vase which holds very limited power.