Is it necessary to have a professional diploma when recruiting managers for five-star hotels?

I am a staff member of Shide Hotel Management Company and have worked hard in the hotel industry for more than 10 years. In fact, I think pragmatism is the most important quality in the hotel industry. A diploma is important, but you need to practice in this industry. A little bit of skill, I think character is the first priority. There is a saying in the hotel: a solid camp, a fleet of soldiers; it means that people have no determination and basic industry quality, so this problem occurs. (This problem not absolute).