No I do not, I think that If you start to loose weight that you are becoming anorexic without the proper exercise and proper nutrition. Why, because without that your just feeding your body less and less stuff and its not the right stuff its like eating less or gorging yourself.
I believe the answer is "true". Getting exercise, improving fitness, and having fun are much more important than winning.
With this question firstly you can think beyond football players. Technology can be used to better understand everyone's health, including people and animals. Think about things like injuries that cant be seen, such as concussions. If a football player wanted to better understand their health they could get an MRI or use other forms of technology. Outside of injuries there is also the health aspect, you can check your cholesterol and blood rate and all that very easily now a days, making it quite easy to check if you are healthy.