Without getting political, the CG *is* part of the federal gov't, and gov't spending isn't going UP any time soon.
You'd be amazed how much money it costs to maintain a long undersea cable to a remote lighthouse, set up and monitor an automated system to change bulbs as they burn out, maintain the mechanism, replace the bulbs, etc.
The LED lights are set-and-forget. They can be powered by solar cells.
I'm a bit of a purist. I still keep and sometimes even use up-to-date paper charts. I like to maintain my piloting skills. I still feel that lighthouses "should" be maintained in their original glory. But realistically, nobody really depends on them any more.