Patur Aval Assur,
If Hashem would give you the Torah and command you to fulfill it but He tells you that whether o not you fulfill it has nothing to do with anything, i.e. there is no reward/punishment and no ramifications of any sort. Would you do it?
This is not much different than the test Avraham Aveinu faced at the Akeida. Avraham and Sarah were barren, yet Hashem promised them that they would have offspring. Miraculously, they have a son at an old age. 30 years go by, it’s pretty obvious that this son is it. Then Hashem tells Avraham to travel to some mountain 3 days away and make an offering of this only son. No reward is promised, no threat of punishment is given. Hashem created everything and is infinitely greater than we are, so He has no need for our offerings. Seems totally needless, right? What did Avraham do?