Hi Poppy11 Welcome to Gransnet. Though you don't want sympathy, I can empathise with you as I had a hip replacement recently, and my mobility was severely limited - but only for a few weeks. I found it very frustrating, having to rely on other people for help in the house, and lifts to wherever I wanted to go. I really feel for anyone who is this situation permanently.
As for the 'holy t-shirts', I have never had this problem. I do have a use for old ones, though. I cut them up to make t-shirt yarn (instructions can be Googled, if interested) and knit/crochet shopping bags and other things with it. Good for charity sales, and the environment.