Why do suppose that tom decides to let Wilson finally have the care he has been promising him?

Tom likely decided to let Wilson have the care he had been promising as a way to make amends and demonstrate his concern for Wilson's well-being. Tom may have realized the importance of keeping his Word and acknowledging his responsibility towards Wilson's care, prompting him to finally take action. Additionally, witnessing Wilson's deteriorating health may have evoked empathy and a sense of duty in Tom to ensure that Wilson receives the help he needs.