A pity you're getting downvoted because its a valid point, although wrong. The problem with your example is it fails the common language "none of your business" test.
Obviously if the work is illegally portraying a trademarked disney character at a party, the time and clothes are kind of important for accomplishing that task.
The "none of your business" test failed in the linked article where the two young women were subject to numerous rules having nothing directly to do with cleaning things.
For example the electrician who installed the high power wiring to my air conditioner condenser, teamed up with an apprentice. As a contractor its absolutely none of my business, I pay a fee for a service and he can bring 50 apprentices on the jobsite, as long as he gets the job done in a workman like manner up to building code following all safety laws, etc. I can provide no input on the tools he uses or the time he takes as long as there's no OSHA/EPA violation, pass the municipal inspection, etc. I'm trading money for fit for purposes accomplishments, not renting a slave to be bossed around.
I can't imagine that asking a contractor not to bring 50 extra people into your home is "none of your business", as it would potentially be pretty inconvenient if you were there at the time.
Similarly, having stipulations like "don't listen to music out loud while cleaning", is also IMO a reasonable thing to require (as someone who often works from home).
For the record, I do think that it's a problem that many companies are getting around the social safety net that employers are required by labor law to provide. But I think that's a problem better solved by decoupling our social safety net from employment--which I think unfairly ties people to their employers.
Obviously if the work is illegally portraying a trademarked disney character at a party, the time and clothes are kind of important for accomplishing that task.
The "none of your business" test failed in the linked article where the two young women were subject to numerous rules having nothing directly to do with cleaning things.
For example the electrician who installed the high power wiring to my air conditioner condenser, teamed up with an apprentice. As a contractor its absolutely none of my business, I pay a fee for a service and he can bring 50 apprentices on the jobsite, as long as he gets the job done in a workman like manner up to building code following all safety laws, etc. I can provide no input on the tools he uses or the time he takes as long as there's no OSHA/EPA violation, pass the municipal inspection, etc. I'm trading money for fit for purposes accomplishments, not renting a slave to be bossed around.