Yeah, but a lot of them are just starting out, and can't produce much product. They don't have the space or equipment.
For someone who would like to be a caregiver, but doesn't know how to grow, the benefit would be that they could hire someone to grow and process the weed for them.
I could rent a furnished grow room to a caregiver. The caregiver could hire me to grow and process the plants. It could pretty much be a turnkey caregiver business, ready to go on day one.
The benefit for me is that I get to grow more than 36 plants, and can focus on growing.