I think your personality: good self expression, friendliness, sincere, passion, confidence (not arrogance) radiates more than physical beauty.
There are so many factors that contribute to a successful interview. I have been to very many interviews in my professional career (non medical) and as I've grown, I've learned to relax, smile often (but not forced), laugh when necessary, be genuine and sincere, and not take myself too seriously, in addition to the paper qualifications needed for the job. I never passed the interviews where i tried too hard & wanted it so much that i was so serious & nervous about it. I always find a common factor between myself and the interviewer - i always ask them questions as well (conversational questions) like how they like being here, etc. non-serious, non-intimidating questions etc.
As for physical appearance, I am a female and allow me to say i am considered very attractive (
and know it). However, this beauty was there when i failed all those thousand interviews miserably. I started to feel like a loser after a while, looks didn't help me at all. People think otherwise, but my looks have never helped me, it's created the wrong impression if anything and always made me have to try harder to proof myself. In addition, I have an accent. I was raised in Africa till i was 18. And for years i was very conscious about my accent and that made me insecure and that lack of confidence contributed to my failed interviews. I grew up and learned interviewing skills, it's an art. It can be learned. That helped, I haven't failed a job interview since then, phone interviews and in-person interviews, instead I am the one turning them down.
How you dress also matters, wear something you feel super comfortable in. I don't wear career suits - not comfortable in them. I wear a grey/black simple dress and a grey or black blazer (in contrast to the dress) on top. Those career suits are just damn too serious making me look like a prime minister, church lady or something - so not my personality. I am a chic, not a woman - they have to know this at their first glance!
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And when i got my last job, i was told that 11 people (male & female) was interviewed & showed interest in my position and only I was hired. I asked the person who is now my boss why he hired me, he said - he saw that i was passionate about my work and had a sense of humor. I had a very high profile job in my previous position - my former boss said same too. In my current job, there are business professionals and presenters etc, but i am called to speak

at government agencies about what we do and what we have to offer. I was just a lowly software developer with no interpersonal skills (in addition to family influence, one of the reasons i picked technology, is so i don't have to deal with people or speak much) but i have done so much of that in the past years. These days i am the one that people meet and within 20minutes and they've told me their entire life's story.
So forget your gorgeous face and muscles, they don't help! Get the right qualifications and learn how to interview - learn how to make a great first impression, learn how to make someone like you within the first 15minutes - learn how to be a sincere, friendly person that people are drawn to and you will ace any interview or meeting. I am still learning this skill myself, there are many self help books to help, i listen to some in my car all the time.