I do not think that the fact that we can and do choose to sin diminishes Christ’s act, in fact it increases the value 10,0000 fold.As you say, if sinning is somehow inate then we have diminished, even negated the responisbility for it. That God would forgive deliberate transgressions would seem to me to be amazing.
The other apsect is motivation. Most reigions demand a certan standard of religiious behaviou over and above the basic day to day stuff. They do it because it is required, not necesarily because they want to. It is not so much buying a stairway to Heaven but appeasing and sucking up to a vindictive and vicious God. Christianity turns that on its head and claims that God wants us as we are. Yes there are standards but they are not religious orceremonial. We pray for a reason other than it is sunset. And we pray whenever it is needed rather than 5 tmes a day (or whhatever)
Scripture says that god does not want meaningless sacrifices or offerings Christianity (should) take that away, although the Higher churches seem to revel in it.
Except…
1 John 1: 5-10 NRSVUE
5 This is the message we have heard from him and proclaim to you, that God is light and in him there is no darkness at all. 6 If we say that we have fellowship with him while we are walking in darkness, we lie and do not do what is true; 7 but if we walk in the light as he himself is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin. 8 If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, he who is faithful and just will forgive us our sins and cleanse us from all unrighteousness. 10 If we say that we have not sinned, we make him a liar, and his word is not in us.
Nor is there a claim that having a relationship with god requires a certain standard of both honesty and acceptance.
What I am saying is that the forgiveness of sins is not reliant on us recognising God or accepting it.
Like others you see to be confusing having a reltionship with God with forgiveness of sins. God forgives sins, period. Our acceptance is a part of our forming a relationship, it does not somehow ratify the forgivenss and the contra that sins that are not confessed are not forgiven. The problem only occurs if we try and convince God that we are not sinful or deny a sin that should be (has been) forgiven.