I think it’s more likely the poster was asking for someone who makes enough money that they don’t have to worry about them paying their part of the rent and perhaps aren’t on such an odd schedule that there becomes the potential for interpersonal issues.

You jumped to some extreme conclusions here.

Wanting to live with someone purposely on the same schedule or purposely on a shifted schedule both have to do with job class.

Same if you care about if they will be working from home or not. Having someone around literally all the time can be really great or really awful depending on your personality

Filtering out students or non students is also extremely reasonable and is related to job class (full time/part time)