Its all performance.

The US notified Yemen that they were going to attack, where and when they would strike. They stayed back at the absolute limit of their missile range and fired. The Houthis didn't even bother to turn on their AD radar.

The US looks good to their domestic audience, and this will satisfy (for now) Israel that "we've got your back bro". But they spent who knows how many tens of millions on an empty performance that accomplished nothing. It not only failed to make even a scratch on Yemen's ability to fight, but they responded by saying the blockade still stands and they're adding American and British vessels to the banned list.

So typical end of empire behaviour by the Americans and their British lapdogs.