I don't think the major reason why the government is fighting this is because of dominance, well I'm only speaking from my personal point of view especially about my country and the reason I think the government of my country is fighting Bitcoin and cryptocurrency at large is to avoid the several cases of untraceable scam transactions through bitcoin since bitcoin transactions can't be track.
I also got a popular bitcoin enthusiast in my country talking about bitcoin and cryptocurrency at large and he also explained and made me understand that the government of my country isn't fighting these cryptocurrencies per say but what they're doing is avoiding been associated with bitcoin and anyone doing this, should be doing it at their own risk without wanting the government fight for them in case there is scam, fault or complications with the transactions.
Each individual is directly responsible for his own policies in buying and selling cryptocurrencies. Of course, because the government does not act as a representative issuing cryptocurrencies and the government is not a supervisor, everyone is responsible and bears their own risk when engaging in trading and investing in crypto. Agree with you that the government will not fight for and accept if there is fraud, error, or transactional complications and all other forms of risk because they are not the person in charge.
Well, taking advantage of bitcoin's intrinsic anonymity is necessary. But, the question is why your government is doing it and the answer is that it's all to avoid unhealthy transactions, misuse and so on. that's why it's no wonder that regulations are tightened because they are unable to track bitcoin transactions.
My personal opinion is not the dominance that is seen there, but they want to know more about the technology that is in BTC and they only use their special rights to easily enter and monitor it.
Yes, it's true that every government will definitely tighten its regulations as cryptocurrency grows and develops, this aims to maintain the stability of each country. I don't think this step is wrong, considering that the Government does not prohibit its citizens from investing in cryptocurrency in any form, regulations are tightened with good intentions, as you mentioned the goal is to avoid abuse and unhealthy transactions.