Again, according to you, then, we would have to read the immorality and idolatry mentioned in 1 Co 10 as having no effect upon salvation, but we read in 1 Co 6 that the immoral and idolatrous have no inheritance in God's Kingdom, so, no, that isn't a sound exegesis.
Also, the "wreath' Paul wanted to win is a "crown" that is "imperishable"--the "crown of life", without which, you're dead, so, yes, it is an issue of eternal life. Death first came through sin. Righteousness leads to life. This is why the crown of life is also called the crown of righteousness. Righteousness results in life. Righteousness is an issue of eternal life, and that is precisely the topic Paul is touching on (his making his body into his slave--otherwise your body makes you into its slave, which is called "sin", so the discussion is about righteousness).
Nothing of what you say makes any sense.
You need to realize that in this very large group of Hebrews that God delivered out of Egypt and not all of them were genuine believers. Hence, later
destroyed those who did not believe, so of course immorality and idolatry would have been a manifestation of their
unbelief. This is not talking about the righteous falling into immorality and idolatry and losing their salvation. That is your eisegesis.
1 Corinthians 6:9-10 is describing the sinful lifestyles of the
unrighteous. In Galatians 5:19-21, these are the same unrighteous people who
practice such sins.
No one who is born of God practices sin (1 John 3:9) so these are not genuine believers who lost their salvation.
The righteousness you are talking about is 'self-righteousness' which is in contradiction with (Romans 4:2-6; 11:6; Ephesians 2:8,9; Philippians 3:9; Titus 3:5; 2 Timothy 1:9 etc..).
There are multiple crowns in scripture which are imperishable.
1. The imperishable crown
2. The crown of rejoicing
3. The crown of righteousness
4. The crown of glory
5. The crown of life
Do you believe that all of these crowns are synonymous with receiving eternal life and all believers will receive them? In Revelation 19 we read about the coming of Christ and in verse 12, we read - His eyes were like a flame of fire, and
on His head were many crowns... So, what do those crowns represent? Are they all synonymous with receiving eternal life as well? Scripture cannot contradict itself. Paul is on record all throughout the New Testament stating that salvation is by grace through faith, apart from works. (Romans 4:2-6; 11:6; Ephesians 2:8,9; Philippians 3:9; Titus 3:5; 2 Timothy 1:9 etc..). It would make no sense for him to be saying we work hard for and earn eternal life in a race just like we would work hard for and earn a gold medal in an Olympic race when salvation is a free gift that is not based on works.
Nothing of what you say makes any sense.
In 1 Corinthians 9:27, Paul is talking about being
disqualified for the prize (NIV) and not disqualified for the gift of eternal life. In context, Paul has been discussing preaching the gospel. In verse 18 he says, "What is my
reward, then?" In verses 24-27 he illustrates this thought of his
reward by the picture of a race run for the
prize. Salvation is a gift that we receive by grace through faith, (Ephesians 2:8,9) and not a prize that we race for, win and earn.
Prize (brabeion) - the prize awarded to a victor, the
reward (recognition) that follows triumph. That does not sound like a free gift to me. (Romans 6:23; Ephesians 2:8) 1 Corinthians 3:14-15 mentions - If the work that anyone has built on the foundation survives, he will receive a
reward. If anyone's work is burned up, he will
suffer loss, (of reward)
though he himself will be saved.
1 Corinthians 9:24 - "Do you not know that
those who run in a race ALL run, but ONLY ONE receives the prize? Run in such a way that you may obtain it." In an Olympic race,
all runners run but only one receives the gold medal. So, what happens to the runners that receive the silver medal or bronze medal or finish the race with no medal? Are they disqualified from the Olympics or for the
prize? Everyone who falls short of winning a gold medal is not disqualified from the Olympics.
Paul does not seem to indicate any insecurity about his position - Finally, there is laid up for me the crown of righteousness, which the Lord, the righteous Judge, will give to me on that Day, and
not to me only but also to all who have loved His appearing. (2 Timothy 4:8) Do you believe that the other 4 crowns were laid up for Paul as well?