Are you of the opinion that the US Military is responsible for all western shipping transiting the Middle East?
How about Africa, does the US have a responsibility there as well?
There was an international response to the Houthi Red Sea attacks, including British, Indian, French, Pakistani, Danish, German, Greek naval vessels (and thats not the full list), all listed as escorting or defending merchant vessels.
The US has long since taken on itself the responsibility of guaranteeing maritime trade. That’s part of the Pax Americana.
USA is intimately connected with the Red Sea. Much of the world’s oil transits there. Sunk tankers and strait avoidance raise the price of gas at our gas pumps.