Which are extremely vulnerable to Iran's ballistic missile force, as we've seen in the Ain al Asad attack. In contrast to carriers that can stay out of range in times of calamity.
That is the reason why the US has recently scouted potential bases in western KSA, where the US would host troops they'd drawdown from their vulnerable land bases close to Iran.
US exploring new bases in Saudi Arabia amid Iran tensions
DUBAI, United Arab Emirates -- The U.S. military is exploring the possibility of using a Red Sea port in
Saudi Arabia and an additional two airfields in the kingdom amid heightened tensions with
Iran, the military said Tuesday.
While describing the work as "contingency" planning, the U.S. military said it already has tested unloading and shipping cargo overland from
Saudi Arabia's port at Yanbu, a crucial terminal for oil pipelines in the kingdom.
[...]
These locations likely would not have permanently stationed troops and could allow the U.S. to drawdown forces at other bases through that flexibility, she said.
“If we are trying to have a flexible posture where we are not tied to permanent bases, ... you are going to need to back it up with a logistics network that can make sure you can flow in people and weaponry as needed,” Wasser said.
Such contingency plans already exist in the Mideast, like the agreements that grant American forces rights to use bases in Oman under certain circumstances. But the western coast of Saudi Arabia also provides additional distance from Iran, which has invested heavily in ballistic missiles as sanctions have locked it out of global arms sales.
The Persian Gulf "would be contested waters under any scenario of armed conflict with Iran, so you look at the places where you would move your forces as they enter the theater from being in a contested area,” McKenzie was quoted as telling journalists in Yanbu.
The U.S. military is looking into using a Red Sea port in Saudi Arabia and an additional two airfields in the kingdom amid heightened tensions with Iran
abcnews.go.com
We've reached a point where due to a missile threat, the US is likely to abandon most of its bases around the Gulf when the shooting starts.