The 30,000 number comes from the Ministry of Health. It seems the UN number also aligns with the new 30,000 number. This is much worse than the 3,000 that was reported earlier. But it also seems like the crackdown is over now, and we're still just counting deaths from Jan 8 and 9.
I compare this to the recent protests in Bangladesh, where Sheikh Hasina ordered the military to shoot the protesters and the military refused. The difference between these two countries is proof that people do have the ability to disobey orders from authoritarian leaders, and that decision can have a huge impact.
Then why does the article say that they couldn't independently verify the number and that the only source is a German-Iranian eye doctor?