Working out or doing ANYTHING for someone else is not a good thing. If you are overweight but happy with yourself, thats amazing and thats all that matters. What YOU think.
If someone works out HUGE and is REALLY fit and they feel good about themselves, thats also an awesome thing.
In life the people I like are the people who do things or look a certain way because thats how THEY like themselves. People who do things for others or who care about what other people think are losers IMHO. Everyone is different. Some of us are overweight, some of us are small, some of us never lift weights etc. As long as you are happy with yourself in whatever you are doing, thats what really counts IMHO.