Why can’t choosing good be the meaning of our existence?

“On the other hand, this goal cannot be the correction of ourselves, since there is always the possibility that He will not create us at all, and then there is no one to correct (there is no deficiency that requires correction). Therefore, this goal must be found outside the created universe.”
Why is it unlikely that the goal is that we choose good? (If the goal is free choice – it sounds reasonable to me that within free choice the goal in free choice is that we choose good…) – If I come from the assumption that the goal is *that we choose* good – then it is clear to me that not creating us would not meet the goal.
In addition, “the conclusion is that the very fact that we were created means that we and our actions and choices are also means to something outside of us, higher than us. Our actions are also supposed to promote other principles that we will now call “religious”, not just morality” –
So before we received the Torah, there was no purpose/actions to life?