We CAN'T observe the commandments of God because it impossible for a sin tainted human being to do so, and nobody but anyone who willingly puts themselves under the authority of the Catholic church is bound to obey the RCC.
We are not bound to obey the commandments of God to earn or merit salvation because that's not why the Law was given. The Law was given to lead us to Christ, not as a means of procuring salvation and favor with God.
We are obligated though, as ambassadors of Him, to live lives worthy of His name to bring Him honor and glory.
Not to mention that any true believer hates sin and really doesn't want to sin anyway, even though we all slip and fall.
Romans 8:15 For you did not receive the spirit of slavery to fall back into fear, but you have received the Spirit of adoption as sons, by whom we cry, “Abba! Father!”
We CAN'T observe the commandments of God because it impossible for a sin tainted human being to do so, ...Really a very odd idea. And I suspect you reject the following, as well:
“Jesus said to them again, ‘Peace be with you. As the Father has sent me, even so I send you.’ And when he had said this, he breathed on them, and said to them, ‘Receive the Holy Spirit. If you forgive the sins of any, they are forgiven; if you retain the sins of any, they are retained.’ “
Let's see what Jesus says.
John 15: 1 I AM the true vine; and my Father is the husbandman. 2 Every branch in me, that beareth not fruit, he will take away: and every one that beareth fruit, he will purge it, that it may bring forth more fruit. 3 Now you are clean by reason of the word, which I have spoken to you. 4 Abide in me, and I in you. As the branch cannot bear fruit of itself, unless it abide in the vine, so neither can you, unless you abide in me. 5 I am the vine; you the branches: he that abideth in me, and I in him, the same beareth much fruit: for without me you can do nothing. 6 If any one abide not in me, he shall be cast forth as a branch, and shall wither, and they shall gather him up, and cast him into the fire, and he burneth. 7 If you abide in me, and my words abide in you, you shall ask whatever you will, and it shall be done unto you. 8 In this is my Father glorified; that you bring forth very much fruit, and become my disciples. 9 As the Father hath loved me, I also have loved you. Abide in my love. 10 If you keep my commandments, you shall abide in my love; as I also have kept my Father's commandments, and do abide in his love. 11 These things I have spoken to you, that my joy may be in you, and your joy may be filled.
What else does Jesus say?
Matthew 5: 43 You have heard that it hath been said, Thou shalt love thy neighbor, and hate thy enemy. 44 But I say to you, Love your enemies: do good to them that hate you: and pray for them that persecute and calumniate you: 45 That you may be the children of your Father who is in heaven, who maketh his sun to rise upon the good, and bad, and raineth upon the just and the unjust. 46 For if you love them that love you, what reward shall you have? do not even the publicans this? 47 And if you salute your brethren only, what do you more? do not also the heathens this? 48 Be you therefore perfect, as also your heavenly Father is perfect.
Yes, you might be right. Let's not even bother trying while we struggle to open the champagne bottles during our limo ride to heaven.