You are 100% correct in your assumption!! I'm underweight but severely disabled and I have ceilings hoists in my bedroom and living room. I also have a custom "sling" (I was too skinny for the normal adult ones, but too tall for the kids ones) and it really is comfy as fuck!! I regularly opt to just hang around in my sling with my legs propped on a footrest when watching TV in the living room. It's more comfortable for me than being lowered onto the sofa as my joints are fragile and dislocate 30+ times a day. My hoist and sling cradle me in a way that stops my joints from wandering out of place when I relax so I just chill out in the sling, hanging from the ceiling. I also enjoy getting my friends drunk and letting them "fly" themselves around the room. It's great fun.