Because all people would ultimately have done the same thing as Adam and Eve,
God has two choices:
1. Don't make people, and avoid giving them the opportunity to select the good or the bad;
2. Make people, and give them the opportunity to select salvation or not.

There's no such thing as two choices when your omnipotent. There are only infinite choices.
Unless of course your god (the Jesus thingymajig one) isn't omnipotent, which renders it another one of these silly false ones.