Joseph: You intentionally misread that Rambam and Shulchan Aruch. As a base, it’s Muttar to leave for the Shuk, Simchas, visiting relatives, and doing Chessed as often as she likes, as is explicit. On top of that, it is a “Gnai” for her to “galavant” more than once or twice a month.
And calling something that is a “Gnai”, which is a Lashon of an Eitzah Tovah or a Middas Chassidus at absolute best, an actual Issur is a D’Oraisa violation of Ba’al Tosif and is quite honestly probably a violation of Megaleh Panim BaTorah Shelo KeHalachah because you know that you’re misrepresenting the Halachah. Is inventing Chumros on the internet really worth losing your Olam Haba over?