You have made some really great points. I would say that all of the verses you have shared do not indicate anyone can lose salvation . Over the years I have counseled those in the church, and the majority have fear of losing their Salvation. Salvation cannot be lost, Christ secured Salvation with His very own blood.
With his own blood—not the blood of goats and calves—He entered the Most Holy Place once for all time and secured our redemption forever. Hebrews 9:12
God's Grace covers us when we are still very much His children learning to walk, so to speak. No one is worthless to God, and I am sorry if you may feel at times that you may not be doing as much as you would like, God perfectly understands and is always more than willing to help us.
For we do not have a high priest who is unable to empathize with our weaknesses... Hebrews 4:15
It's more that they were never saved to begin with...
that's always the fear with verses like those.. especially in combination with Calvinism, which with Romans 9 seems to be supported, and in that case it opens the possibility that you choose God but God has not chosen you.
I have to fall back on some things Jesus said in John 6
37 All that the Father giveth me shall come to me; and him that cometh to me I will in no wise cast out.
44 No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day.
So.. I have to trust that if I choose Jesus, He chose me too, and that He wouldn't reject me if I come to Him.
but doubting my own self worth is one of my largest hurdles.
"why choose me, I'm worthless"
"why even create me, I don't even like singing"
"what can I do for the gospel, I think that I'm so bad with people that I couldn't even convince someone that water is wet, they'd disagree with me just because it's me telling them and obviously I'm wrong about everything"
like.. Ive encountered people arguing , and using Jesus' name as a curse.. and so.. I thought, Gospel opportunity
and tried telling them about Jesus
oh it stopped the fight
they just both started cursing me and cursing Jesus instead of each other.
I'm just... really bad about it.