The interviewers should understand that as a RDH you already know how to read radiographs, diagnosis dental problems and recommend tx (of course you aren't really diagnosising that would be illegal since you aren't the dentist 😉) The one thing that your DAT scores, grades and CV can't tell the interviews is what is your personality like. As dentist in private practice you are basically running a service industry small business. Do you have the type of personality that will attract and keep patients? Are you the type of personal that skilled dental workers will want to work for? If your personality is not conducive to attracting and motivating people then no matter what your scores and grades are you will have a very hard time making a living at dentistry.