And by the same token, I don't know why some state-level actor would want to attack Haypenny either. Or PayPal, or Visa, or Citibank, or a corner grocery store?
Perhaps it's because they find it easier to shut down companies? Lol. Are you seriously asking why they'd target a company instead of Bitcoin, which is like a billion times more challenging to shut down?
I agree Haypenny can be attacked, but so could anything.
Why should I use bricks to build my house instead of just wood? After all, both materials are susceptible to damage.

Have governments gone after the many blockchain-based currencies that are defacto centralized (e.g. Ether)? I don't see why they would since these entities have public ledgers like Bitcoin does, and as such they can be tracked by anybody, including criminals, marketers, and... governments.
That's why they are cracking down mixers and other privacy services: they are central points that can be shutdown easily. What actions have governments taken against Monero? Despite being infinitely superior to any mixer, it continues to operate smoothly. Here's a hint: Monero operates in a decentralized manner.
Of course we follow the law. There's no demand for an entity to do KYC who does not take in or give out tradable money. We are regulated exactly as any cryptocurrency is regulated.
Therefore, Haypenny functions as long as it complies with the laws of its country. The difference with cryptocurrencies is that they operate independently of any country's laws.