It can be rather irritating, and on occasions, painful to wear stiff formal suits and tight formal footwear. To sit all day and work in such attire can sometimes be infuriating. Not just clothing, but the formalities can be irritating after a while too. I do agree that following etiquette and the right mannerism is important, but it can be rather frustrating to have a smile on your face while talking to your senior when you are suffering from a sore foot. The formal niceties get so clichéd after a while that all you want to do is to put your feet on the table and work. Of course, this is not possible in an office environment. When you work from home though, you have the freedom of lazing around on your bed or sofa or easy chair, wear what you want, and work without having to worry about your surroundings.