I think that it was inevitable. In 2016 and yearly years, privacy was not a problem because these coins weren't popular and weren't massively adopted. Now they are very popular and accepted in many places, this is a threat for FED, they'll do whatever it takes to kill it but you know what makes me smile a little bit? They are banning mixers, privacy wallets, soon they'll probably ban privacy coins but something new will pop up, something better, stronger and it will be very difficult for them. Something new will always pop up, so nothing ends here.
What you have stated is a very important point - anything that the FED finds is a threat they will try and take down. For example, I have observed that privacy coins in Australia are completely banned/illegal, including Monero, Dash and ZCash. It won't be long before they become banned in places like the U.S.A. It's sad and disappointing, and I'm not sure if anything could be replaced by that is "better, stronger" if it's actually a policy based issue.
When the FEDs of this world do cryptocurrency investigations, using software like Chainalysis, TRM Labs, Eliptic etc (blockchain big data analysis), they encounter issues when cross-chain hopping occurs, or coins go into mixing services. Banning Samurai Wallet is one step to reduce the options available, and banning privacy coins is also another step. Soon we will see any decentralised exchange smart contract developers in trouble also..