It doesn't mean that we can't obey.
So again, do you accept Deut 30:11-14, that keeping the law is easy, or do you think God is lying?
Observing stuff from the Law is easy, keeping it perfectly (as God would) is not.
There has to be an established Standard, or it's just arbitrary
and the Bible repeatedly points out God is perfect and we are not.
"As for God, His way is perfect,
the word of the LORD is proven" Ps 18
God predicting Israel's rebellion and failure doesn't mean He is ok with it.
He prophesied Israel's future faithfulness,
and the OP contents it's on Him to make it happen, because that is the only way it would ever happen.