First, I will say that it is much easier to pio-sneer when you are collecting a check from the government (retirement, welfare, or disability) or are supported by a parent than when you have to work 40 hours a week on a low-paying job. Many of those in business are in cleaning businesses, and there is a lot that goes into running a business to keep it operating (and that's even before Osama ObamaCare. (Which adds 2,000 pages of regulations and links to countless other pages that could trap such businesses.) You need to maintain accounts with suppliers and customers, and if you have employees, you need to make sure they are doing their job properly and getting paid (and more paperwork).
If you are sick, there is a good reason for disability. People with certain conditions are aggravated by continual activity. Some of these conditions will resolve if given proper therapy (natural or allopathic, or blended) and the person is not expected to be out there all the time. Back problems are often aggravated by field circus--I remember having back spasms that were aggravated by boasting sessions and field circus, that would improve with gentle lifting with my back. I can work with my back like that--albeit having to be careful not to bend my back too far. However, pio-sneering would make it worse so I would become disabled with it. Out of field circus, this condition has remained a non-issue.
And there is stress from field circus. Getting in and out of cars is hard on your back--sometimes even worse than lifting heavy weights with your back. If you are weather sensitive and it gets colder or a prolonged spell of wet weather comes, you can be sidelined for weeks at a time. Trying to work in field circus at such times is inviting the base problem to get worse. People with leg or foot problems shouldn't do much climbing stairs--particularly older people that have balance problems. It could aggravate a moderate problem into a severe one, and there is a risk of falling (especially for older people, who could break a hip). People with major breathing problems, particularly COPD, can be aggravated by drizzly or misty weather, smoke from people at the door, dry cleaning fumes, or just being out in field circus during hot muggy weather.
Aside this, there is one big reason why anyone should not pio-sneer. What are the actual costs? It is going to cost you money on car repairs, gas, suit dry cleanings, and supplies. It is going to cost you time--that you could have done other things with. It is going to cost you health--lack of sleep, stress, and the Pio-Sneer Diet. It is also going to put you with people you may not get along with for much of the time--they seem to always arrange things so those who are domineering are with those who they seek to control. You need to also analyze the benefits--and not be excessively optimistic. Are you really going to accomplish anything worthwhile? Is your life really contingent on pio-sneering? And, if the costs exceed the benefits, you have no business doing it.