Since so few of us fit into society's (read the media's) grand definition of beauty it seems reasonable to presume that there only a few yogis who are atypically bendy, and therefore capable of some of the more acrobatic poses. Popular yogis, like Rodney Yee was a dancer and a gymnast before he became a well known yoga teacher and practitioner Talk about an unfair advantage! Many everyday yogis are unable to complete a pose as demonstrated by yogi models, and I wonder how many of our favourite yogis are moving in pain or compensating their movement in one way or another.

Most of us have anatomical limitations stemming from tight or weak muscles, injuries and genetics which challenge our yoga practice. As such, we move in pain or compensate our movement to get into and out of some poses. I'm flexible which is helpful for getting into some poses, but there are poses for which I lack the muscle strength or congruency to do correctly. Instead of moving purely, and honoring where I am, I'll let my ego take over and simply flex my way through a pose.
Beauty, similar to how we look in our poses is an external characteristic and doesn't begin to describe our heart or our intention, that is our True Self. That said, challenging ourselves with poses IS fun, and the key is not to take it too seriously. I approach my poses from a "function over form" perspective which essentially boils down to adapting a pose to suit your body and mind to where you are in the present moment. I describe this perspective in terms of a spectrum, and I encourage my students to find where they are along it as we practice.
For example, Vrksasana (Tree Pose) is broken down into 1) balancing on one leg (right) and 2) externally rotating the opposite leg (left) in the its hip socket, and 3) lifting your (left) foot and placing it anywhere along the (right) balancing leg, except for the knee. The variations that define Vrksasana's spectrum is where you place your foot on your standing leg, whether or not you use your arm to lift and place your foot on your leg, and your arm variation (eg Warrior arms, Charlie's Angel, in prayer, hands on wait, T-position, eagle arms etc.). There are as many ways to express your Vrksasana as there are yogis, so have fun with it and get creative. Try introducing some flow into your pose by flowing from one arm variation to another, just remember to stay connected with your breath. Here are a few examples of where I fall on the Vrksasana spectrum:

Remember, yoga is a personal practice and the diversity among us physically, creatively and mentally is inspiring, extraordinary and worthy of celebration. Make each pose your own!
"The power of finding beauty in the humblest things makes home happy and life lovely." - Louisa May Alcott