first, let me preface this by saying that, as in civilian life, a guy sees a girl because of chemistry, and what's inside, as well as what's on the outside. someone who isn't drop dead gorgeous might still be incredibly skilled or a lot of fun to be with.
also, remember beauty is in the eye and all that. what i consider a 10 might be a 9 or an 8 in someone else's opinion.
unfortunately you ladies are in los angeles, the city with the most beautiful women in the world. people come here from all over the world to get into show biz, and show biz loves beautiful people. that means that even the waitresses here are usually way prettier than average in any other town. just walking down the street or going to the supermarket will present you with numerous breath-taking ladies.
so you girls have very stiff competition in the looks dept. now that's not to say that someone who is not model gorgeous cannot have dynamite skills, or a great personality (and trust me, personality counts a lot in this hobby. i'd rather be with a nice person that seems to enjoy my company than a cold, stand-offish one).
so my point is, at least for me who makes a living in show biz and is constantly working with beautiful women, the bar is very, very high. if you don't look like scarlett johansen or kate beckinsale or in that range, i am sorry, you are not a 10. but there's nothing wrong with being a 9 or an 8.
as to your question, why would i see someone who i dont think is a 10? well, unless we are going out on the town (and that's rare), i'm seeing someone for her skills and her ability to make me feel like a million bucks. i very much consider the performance scores above the appearance scores.
stop worrying about your appearance and concentrate on your skills and your ability to connect. that will give you great reviews.
plus, i find that for me, if i love a girl's performance, i tend to rate her looks a little higher as well.