You can be luxurious, fur lined and casual and still run up a trillion dollar tax bill. Just because you did it while watching TV at the same time does not make it magically invisible.
You are right, but I think that the OP is hinting that the IRS is going after the small fish while ignoring the whales.
But I agree with you. Tax liabilities don't change whether you are doing crypto-trading for a hobby, or whether you are doing it as a part of your career. Enough loopholes are available in the tax policies, to reduce the amount of taxes that you need to pay. But saying that crypto-trading was your hobby and it was not serious is not a valid excuse.