If she even mused about moving in with Grandpa to take care of him, that's proof she's starting to understand she won't be able to afford her own living expenses much longer. Not the luxury apartment, but any apartment at all. Someone she trusts must have pointed out she'll be unable to earn enough on Twitch to get approved for even a studio apartment.
"My Grandpa/Aunt/Mom is old. She needs me to take care of her!" is the top excuse for chronically unemployed cluster B's who've reached middle age. They get to live for free with the older adult who owns a house or has subsidized housing. Then the "care" excuse lets them stay unemployed forever because they're just too gosh darn busy taking care of that poor old lady.
Usually the older person is perfectly capable of taking care of themselves, and sometimes they're even working full time jobs. The worthless NEET doesn't want to do any actually homecare for the elderly. I knew one "taking care of Mom" asshole whose mother we later found out was a 6 figure salary executive at the time.