On my second read of the story, that is sort of what she is saying. Except she isn't talking about poor people per se - just people. Thing that escapes her logic is that poor people don't generally invest in new businesses of any kind. There is probably more money for people in the weed game keeping it illegal. But also more risk. In the legal trade there are now many layers and lots of overhead from growers to distributors to retailers to the landlords to the state taxes to the income taxes paid by all. In the illegal game there are levels of distribution I'm sure too but not as much regulatory oversight or overhead costs. Personally don't think its worth sending anyone to prison for weed but that wasn't her point.
Legalize drugs for everyone over age 65.