The US has bases around the world because its auxiliary fleet is rather limited. Its always an advantage to have supplies nearby because shipping or flying anything thousands or half way around the world is just too hard.

Lose those advantages and even the US military is troubled and the results are what we see today. It cant invade Iran and it cant even bomb or launch an invasion of Houthi territory.

Did i mention the Ospreys which were built because of the Tehran Embassy hostages from the 1980s are grounded today or limited to very short trips because of constant mechanical failures ?

Smokes and mirrors, its not a smart thing to show your enemy your weaknesses.