To be honest: yes, at this point, and with an industry of this scale, it's a bit shocking to me.

I don't know the main actors here, but I imagine the leverage of shipping companies on western countries is incredible ? ("oh, you think our boats are too polluting ? sure, let's see how you bring "about everything that's sold in about all your shops but that is manufactured half a world away" without our boats.")

I speculate that it's the ports which make the rules and they're not bothered by having to charge more for fuel, as ships are wholly dependent on that. Meanwhile local authorities can put pressure on ports to not provide certain types of fuel.

When maritime shipping quintupled in price during the pandemic it wasn't because ship operators suddenly figured they could fleece people like that - it was the ports' logistics which were all out of whack.