Thats true, you'll never deploy your full force except in an emergency. The UK gave up some of its earlier production slots so that the USMC could have them....so its quid pro quo.There has to be jets on land for training and spares/under maintenance. If you move all the F35s to the carriers none will be left for training pilots.
Also they issued statements indicating interest to deploy a carrier on a long term basis in Middle East or Indo Pac. Whether that materializes is another question
There have been no statements about deploying a carrier on a long term basis in the ME or Pacific. There have been statements about increased presence, but that doesn't mean a carrier....it will be an occasional visitor, nothing more.