Well binance was violating US laws until CZ got the book thrown at him so hard he had to pay a billion to bail himself out with a presidential person. The law is a bit subjective when things get to such a high profile.
Binance isn't going by the letter of the law and playing it safe here for sure. They want business to continue at any cost.
What is the EU going to do? Sit and watch? Pursue a judgment through courts trying to play it fair and maybe fine binance?
They can exert a lot of influence outside of th courts too, or even pursue a case against binance through the court they have the most influence to so they can establish some strict precedent.
During the Wild West era of cryptocurrency, every crypto exchange violated US laws. Binance was the largest crypto exchange to pay a hefty fine, but I've seen calculations showing that their operations earned them twice as much as they paid in fines. CZ handed over half his profits, spent four months in a comfortable American prison, and is now a billionaire.
I think you understand perfectly well that the size of the fine is irrelevant if the company's profits ultimately turn out to be greater.
The EU could designate Binance as a terrorist organization and imprison all traders for treason (this is the harshest option, but very effective).