@FLClover
If at first you don't understand, even when you have asked for clarification, I'd look elsewhere. He may be brilliant but he can't communicate. And it won't be his fault if you misunderstand, that's pretty certain. He's not an oncologist so making comparisons is both irrelevant and pushy! It's hard enough to make decisions about surgery with someone you understand and trust. Some practitioners have to learn the hard way that the days of a patient doing something completely unquestioningly are over. We're not the specialist, but we're not entirely stupid and it's our bodies. If he can't be bothered listening, what else can't he be bothered doing? Best wishes for a better encounter with someone else.