Nonsense. Armchairs were a status indicator. According to Ron Hurst, Chief Curator and Vice-President of Collections at Colonial Williamsburg, armchairs were few in number in any given household and were intended for the head of the household or other important people. Most people of average or low status sat on backless benches or stools until the late 17th century. Female heads of state, like Queen Elizabeth I or her half-sister, Queen Mary I (pictured above), are often shown in portraits wearing huge gowns and seated in armchairs.
Chairs without arms first appeared in the 16th century. Sometime in the 19th century, people began calling them “farthingale chairs,” linking the chair’s purpose with the wide hoops.
This reminds me of the corner-chairs,were-for-men-with-swords myth (see #10).