A woman used to the spotlight
Needless to say, Harry disagreed with his brother. The conversation between him and William was a blow to the woman he loved; he took the comment very personally and as disrespectful to his lady love. Meghan was already used to the spotlight, being a famous actress in the United States. Indeed William based his advice on Meghan’s ability to withstand the media pressure exerted on the royal family. He was concerned for his brother because by entering the royal family, she would have to comply with certain obligations.
She was used to the media, had fans and people who knew her. She was also already dealing with the public scrutinizing her family, and he would not let his brother do the same. Harry was bent upon protecting Meghan from anyone who turned a bad eye towards her. Meghan was no stranger to the world of fame; she was used to all this attention even before meeting Harry. She was a woman who was already famous in Hollywood. However, becoming a member of the royal family was a level of fame she was unfamiliar with, and there were also loads of rules she had to follow. This is the root cause of their disagreement.