There aren't really any ships they could attack in the Red Sea. The only major western company that continues to regularly sail through the area (not counting minor players or individual runs) is French CMA CGM which runs the Phoenician Express line under the protection of the EU operation Aspides. And there are no signs of western shipping returning anytime soon - Houthis may vow to attack only Israeli ships, but their definition of what is an Israeli ship is somewhat fluid. Not enough to convince shipping companies to take the risk. And this is exactly the same situation that was before Trump launched the operation Rough Rider, which in all honesty didn't adress the maritime security in any meaningful way - it was another part of his maximum pressure campaign against Iran, and unless Trump can negotiate a settlement with Iran that will include peace in the Red Sea, the past 2 months of airstrikes will be for for nought.
