If there was really nothing suspicious about the service mentioned in OP, government must not have taken action against them.
Lol. You think the government only take action against things which are illegal? The government works exclusively for themselves, and will take action against anyone or anything which threatens them, illegal or not. They'll take action against someone who did nothing except write open source code under the guise of tErRoRiSm, but they will ignore fiat banks laundering literally hundreds of billions of dollars for actual terrorist organizations.
the reason the mixer dev (as you want to pretend its all he was) was in legal dispute not simply for "just writing code" it was that he was financially benefitting from the proceeds of his code and operating the service. (he took a fee per transaction) which made him a MSB/MTS, which comes with regulations.. it really doe and should benefit you if you read regulations instead of misinformed bias blog posts..
and banks do get penalised. its just the maximum penalty is:
for a bank: just X days fees 0.x% of liquidity
for an individual: more then they can ever afford to pay the court fine
also individuals do not set themselves up as legit businesses to shift the liability away from the operator
which is why individuals operating as MSB/MTS get hit harder because they are personally made responsible rather than the debt/claim/penalty/charge being pushed to the 'business'