That's the issue. William recently visited a homeless charity in my city. He arrived in a modest, anonymous car, no outriders, no entourage. He was with what looked like assistants, but they were probably security, but very low key.
Kate was selling tickets at Wimbledon, talking to fans, stopping for pictures, then went to sit in the regular stands.
This would be an anathema to Harry, he wants to be welcomed like the Queen of Sheba.