Why is in your view a world without God preferable to a world with a supreme Creator ?
Since I don’t know what your idea of a supreme creator is, I’ll just pick one. Most people believe that God pays attention to all of us. We are to ask him for stuff and he answers (or he doesn’t depending on… not sure what).
This idea is predicated on the idea that God guides your life (or *can* guide your life). So when one has a problem, what does one do? Ask God to solve it? If one has a tough decision to make, does he think hard to figure out which option is best (and to create new options not previously thought of before)? Or does he ask God to “help” him choose? When one is suffering due to having so many grave life problems, does he work at solving them or put his life in God’s hands and hope (i.e. have faith) that God will solve his problems?
So a religious person who believes in a personal God (as I’ve described above) will shift responsibility of his problems to God, while a non-religious person won’t shift responsibility of his problems to God.
So which worldview is better: (1) Take responsibility for your problems, or (2) Don’t take responsibility for your problems?
Note that I’m not claiming that all atheists (and barely-religious theists) take responsibility for their problems. People find all sorts of ways of shifting responsibility of their problems to other people and things. Sometimes they shift responsibility to their spouses, parents, children, government, etc. Sometimes they shift responsibility to their brains (e.g. ADD, Aspergers), to their hormones (e.g. PMS), to their emotions (e.g. being angry), etc.
The best worldview is one where a person takes responsibility for all this problems. Note that to do this well, one needs knowledge about how to determine which problems are his.