Because salvation is becoming Christ-like, and it's a process; the only truly meaningful process there is.
It sure sounds to me like the only reason you would ever do a good deed is that you knew that it would have the effect of earning you more salvation points
That would be all the wrong reasons for doing good things. The more Christ-like we are, the more Christ-like our deeds become too. Our good deeds, in the name of the Lord, are simple reflections of our likeness to Christ.
Of course, you could always have Pharisaical individuals who do "good" things ti impress others or to create an illusion of holiness.
It means pleasing Him. With my new heart I want to please God, even though I will be no more saved because of it. Does that sound so ridiculous to you all?
It does because Christ never said He would give us a new heart; He says He would would heal our hearts. You are confusing Ezekiel with Christ.
We can't please God. Just as you can do nothing to "earn" your way to heaven, there is nothing you can do to "please" God. The more Christ-like we become the more we reflect are restored in our original state of creation (in the image and likeness of God). Holy people do holy things because they are holy. Being holy is not a duty but a state.
We can't earn our way to Heaven, but we sure can please God:
Rom 12:1 : Therefore, I urge you, brothers, in view of God's mercy, to offer your bodies as living sacrifices, holy and pleasing to God — this is your spiritual act of worship.
Rom 14:17-18 : 17 For the kingdom of God is not a matter of eating and drinking, but of righteousness, peace and joy in the Holy Spirit, 18 because anyone who serves Christ in this way is pleasing to God and approved by men.
1 Tim 5:4 : But if a widow has children or grandchildren, these should learn first of all to put their religion into practice by caring for their own family and so repaying their parents and grandparents, for this is pleasing to God.
Heb 13:20-21 : 20 May the God of peace, who through the blood of the eternal covenant brought back from the dead our Lord Jesus, that great Shepherd of the sheep, 21 equip you with everything good for doing his will, and may he work in us what is pleasing to him, through Jesus Christ, to whom be glory for ever and ever. Amen.
Whatever the concept of "pleasing" really is to God, He wants us to think of it similarly.
Holy people do holy things because they are holy. Being holy is not a duty but a state.
It's both:
Lev 11:44-45 : 44 I am the Lord your God; consecrate yourselves and be holy, because I am holy. Do not make yourselves unclean by any creature that moves about on the ground. 45 I am the Lord who brought you up out of Egypt to be your God; therefore be holy, because I am holy.
1 Cor 1:2 : To the church of God in Corinth, to those sanctified in Christ Jesus and called to be holy, together with all those everywhere who call on the name of our Lord Jesus Christ — their Lord and ours:
Eph 1:4 : For he chose us in him before the creation of the world to be holy and blameless in his sight.