Yep  technically forks can happen, you're right. The problem behind hard forks is that once the opportunity of changing the rules is given, eventually people form lobbies to change other rules. If we just forked away because of government 6102 order, why can't we also include in the fork a supply increase? or a blocksize increase to 32GB? Or a dynamic blacklisting of adresses by miners? Or the seizure of Satoshi's coins? etc. 

If you think I'm just riffing, look at all the other protocols that hard forked in the past...that is the issue. Once the immutability is broken, you're done with the "immutability" narrative.

> Bitcoin is not gold because Bitcoin can fork.

Yes, but the only "gold-like Bitcoin " is the Bitcoin that technically respected the status quo...all the others are just shitcoin. 

 "if the oportunity of changing the rules is given" 

What are you talking about? No one needs permission to fork Bitcoin. It has happened many times, and will continue to happen. It's just a question of how much of the bitcoin economy forks away. It's part of the game theory.

Bitcoin is a consensus of humans, and they express their will through the code they use to validate their coins. If there is a big break in consensus, a fork will happen. You can't stop it.