Your value is mainly in your soul. :') Our bodies are just tools to help us live in the current world.
However, I see your point. When God created Eden, the purpose of Adam & Eve's bodies was far more superior than our times. Because it was planned for them to live forever and maintain their perfect bodies forever. I believe God created humans to enjoy his creation in the first place and that's why the body was vital.
Today, after the world was plagued. We have disabilities and disfiguration. Many people are unable to enjoy it all anymore.
Also to keep in mind, a weak body won't always have a happy soul. Remember that when the temperature gets too high we cannot behave normally. We also lose control if we drink too much alcohol and we might start growing depression with obesity.
That's why, we need to take care of our bodies for the current time. To allow for our souls to utilize that body to its maximum abilities.