Perhaps they are an essential worker, and don't have the option to stay at home?
Perhaps they have medical issues that leave them immunocompromised and may require hospitalization, putting them at a high risk of death from exposure to COVID patients?
Perhaps they are unemployed or at risk of unemployment due to pandemic restrictions, and the irresponsible behavior of people who are too cool to do body weight exercises at home could directly harm them by lengthening the time these restrictions are necessary?
"It's none of your business if other people break the law in a way that harms others."
Perhaps they are an essential worker, and don't have the option to stay at home?
Perhaps they have medical issues that leave them immunocompromised and may require hospitalization, putting them at a high risk of death from exposure to COVID patients?
Perhaps they are unemployed or at risk of unemployment due to pandemic restrictions, and the irresponsible behavior of people who are too cool to do body weight exercises at home could directly harm them by lengthening the time these restrictions are necessary?
"It's none of your business if other people break the law in a way that harms others."