"Empty chairs" don't impose dictatorial powers over individuals, over productive companies whose productivity is limited by excessive regulations, over religious institutions whose charity and help for those in need is threatened by un-Constitutional intrusions into their ability to operate by their religious principles, and on and on!!!
The vacuum of leadership in upholding and defending liberty, signified by the "empty chair," must not be allowed to minimize the determined, unbending, and dictatorial presence which now "occupies" a place reserved for one who would, like George Washington, defend and protect the essential principles underlying "the People's" Constitution.
.....But the “empty chair” sends a “message”.
My wife asked similar question- What good is it for those who don't know the reference. I responded, they will ask others and others will inform them.
A political sign tries to do the same thing, but I think this is more powerful because its different.