With some clarification in terms of how I would say it so it does not seem to raise contradiction that our actions do not matter, the verses you provide are spot on.
The seeming contradiction that our actions do not matter was one of the shortcomings of Martin Luther’s treatises, but that only was because he did not yet have full understanding of it all.
First, note that I made sure to mention that regardless of our relationship with God, God rewards us for doing what is right, what is good.
It is explicit in Christian Scriptures that everyone is rewarded on basis of actions, not basis of profession of faith in God.
Believing in Jesus Christ is supposed to make good actions easier, and enable relationship with Jesus and His Father.
We have then that believing in Jesus Christ helps towards good rewards for doing what is good, yet adds benefit of spiritual enlightenment.
The problem with our spiritual state is, our motives never are as pure as God’s. In order to develop relationship with God, whose motives always are pure, God asks that we acknowledge our motive problem by accepting His grace made possible in Jesus Christ.
This is essence of salvation, which is, absent acknowledgement of our sinful state, God will not make Himself available for development of a relationship.
I did not mention what I say next in the post to which you respond, but once we acknowledge we are deficient with respect to purity of our motives, the grace of our Lord Jesus Christ helps purify our motives so God finds it easier to develop relationship with us.
When our motives are not pure, we seek God not for who He is, but for what we expect to get out of the relationship.
God, however, seeks relationship with people who want to get to know Him, as opposed to people who seek primarily to obtain benefits from Him.
The problem is, mankind for some reason typically is afraid of developing a relationship with God.
I think perhaps it is because people are afraid of what God will ask of them, what God will ask them to give up or do, so to avoid being challenged they attempt to minimize contact with God.
I believe this is root of every form of worship within which only the clergy are expected to have deep knowledge of and relationship with God, which is, a catering to the desire not to get too close to God.
You might agree with me that there probably are Christian organizations that have devolved to this model.
I hope the foregoing helps clarify essence of my post.
Thanks for taking the time to pen a response.