Does Not Make Sense to Me

My adult child who has a disability draws SSI, not the full amount. Even if she did draw the full amount, that is not enough to pay for rent on an apartment or house in the area where we live. Housing. Not enough for housing. What about food, clothes, electricity, transportation, gas, necessities like sanitary napkins, toilet paper, cleaning supplies, soap, shampoo, etc? A state waiver would pay for caregivers if we could find caregivers to hire. She expresses a desire for a part-time job, but there are many complications. First, are her sensory issues, and illness. If a crying child comes within hearing distance, she's done. Finished. She has enough food allergies that most restaurants would not be an option. Autoimmune issues knock hospitals and nursing homes off the list. In the past, she takes a lot longer to recover from an illness than the rest of the family, and she too dysreulated even with a mild cold to be able to work a job those days/weeks. Thus, the list of opportunities grows shorter and shorter. I found a help wanted ad for a greeting card stocker, 20 hours a week, in just two stores, $11 something an hour. Hmmm. She likes to organize, she'd probably be good at this, and I think she'd be able to take a break and go outside if a screaming kid came within earshot. But according to SSI rules, if I understand them correctly, individuals are allowed to earn $65, and then SSI is reduced a dollar for every two dollars earned. She would come out ahead a little bit, in terms of money, but still not enough to live on. I do not understand the concept of reducing the already small SSI in the event the individual gets a $14,000 year job.