Except the Houthis aren't just attacking ships docking in Israel. They have been attacking any ship to the point that shipping companies have stopped using the canal.

That was the claim you made. It's absolutely true that shipping companies with ties to Israel have ceased to transit the Bab-el-Mandeb, but, for example, COSCO recently sent a ship through and was not attacked because they have ceased all shipments to Israel.

Edit: A number of ships were turning off AIS before transiting the Bab-el-Mandeb early in the conflict. See my comment above to learn more about why that's usually not the best idea.