Today, I had a PhD interview and the interviewing professor asked me about my plans after completion of PhD. I clearly stated that I wanted to fund my own startup and setup my own venture, to which he cross-questioned that why do I need a PhD for founding a company. Even though, I tried to to clarify that my venture would be based more on the research that I'm going to do, he seemed a bit unsatisfied with the answer.
Finally, he told me that if I had any queries or had to say anything, then I'm free to mail him regarding this.
My real answer to his question "why do I need a PhD for founding a company" was that "I didn't want my years worth of research work to end up in some corner of an archiving website, where no one is going to take a second glance later. So, I wanted my research to bloom into a company for the public benefit."
But I was extremely hesitant to give this answer to him back then since it could have implied that his work is also in "some corner of an archiving website, where no one is going to take a second glance later" which would be extremely demeaning.
But, now that I think about it, I feel that I should clarify this stating this proper reason in an email which I gave above.
Would it be a wise idea to do this? And if it isn't, is there any other way of putting it to express my idea to him?
All inputs are appreciated.