There was an article somewhere a few days ago, where the author raised the question: Why buy tanks in a world of drone warfare. Something like that. I see this as much the same "problem". Drones can't really take or hold territory, they can only deny access to it. At some point you need people and armoured vehicles on the ground.

The US is facing the same issue in Iran. You can bomb all you like, but a bomber, like a drone, can't hold land. Iran can launch drones and missiles towards the Strait of Hormuz from the entire country, denying anyone access, but also without being able to hold it.

Because they went in without a plan, or even a goal really, the US administration denied itself, and everyone else, access to the strait. The military leadership probably knew this. If not they could have asked Ukraine if this was a sound idea, given their knowledge and experience with Iranian drone technology.