Written aayahs and supplications on walls in order to adorn houses

The righteous predecessors never hung items with writing or phrases on, on curtains and walls in order to adorn houses and mosques, whether in the form of the Names of Allaah ﷻ or the names of His Prophet ﷺ, and greater than that, the Noble Qur’aan. This action is also a belittling of Allaah’s aayahs, and a ruling was issued to prohibit such action. A person may say, ‘I place the aayah of the Footstool (aayatu-l-Kursy), and the supplication for departing a gathering, in the living room in order for a person who is absent-minded to remember them. Some people may not have memorized aayatu-l-Kursy, and so if we hung it up, and repeat it often, they would memorize it. The same applies for hanging up the supplication for expiating shortcomings in a gathering in order for the absent-minded to remember it, and for a person who is ignorant of it, to memorize it.’ However, is that explanation sufficient to allow such an action? We say, ‘Any action, especially one through which a person draws closer to Allaah , needs a proof to refer to for its permissibility in the religion.