You can't have your cake and eat it too. The text says NOTHING about "faith" but places in direct contrast to Adam's "disobedience" the "obedience" of Christ as the contrasting ACTIONS. If Adam's "disobedience" supplies only legal precedence to judge sinful actions by many unto death and condemnation then Christ's "obedience" supplies only legal precedence for the RIGHT actions of many unto life and justification.
The contrast is between one man's "disobedience" versus one man's "obedience" not between one man's disobedience versus justification by faith as your irrational logic attempts to read into Romans 5:12-19.
Yes, Romans 5 is contrasting Adam's disobedience to Jesus's obedience. I agree 100%.
But Romans 5 is also explaining that Adam and Jesus each set a legal precedent for those who committed similar acts.
For those that sinned like Adam, the judgment or condemnation to death is passed upon them.
For those that believe on Jesus, as Jesus believed his Father, righteousness is imputed to those persons.
You have no clue to the Biblical definition or understand of sin and that is why you espouse such unbiblical views. God looks upon the heart because the heart contains the MOTIVE that determines whether attitudes, words and actions are RIGHT and ACCEPTABLE in God' sight and the only RIGHT motive is in whatsoever you think say and do DO ALL FOR THE GLORY OF GOD and that proper motive is MISSING in infants, children as will all "in the flesh" and that is why they are born sinful BY NATURE as the heart they are born with is not a good heart and their SELFISH attitudes and actions are so obvious that one must be willfully blind not to see that.
OK, I will show you what the Bible says.
1 Jhn3:4 Whosoever committeth sin transgresseth also the law:
for sin is the transgression of the law.
Sin is breaking one of God's laws. A baby cannot sin because a baby does not know the law.
This is what Paul is explaining in Romans 7;
Rom 7:7 What shall we say then? Is the law sin? God forbid.
Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
8 But sin, taking occasion by the commandment, wrought in me all manner of concupiscence.
For without the law sin was dead.
9 For I was alive without the law once: but when the commandment came, sin revived, and I died.
10 And the commandment, which was ordained to life,
I found to be unto death.
11 For sin, taking occasion by the commandment, deceived me,
and by it slew me.
12 Wherefore the law is holy, and the commandment holy, and just, and good.
Paul did not KNOW what sin was until he learned the law. Paul did not know it was a sin to lust until he learned the commandment, Thou shalt not covet. Without the law, sin is DEAD, it has no power, no authority over you. Sin cannot condemn you until you know the law.
Paul says he was spiritually alive until the commandment came. This is when he learned the law as all Jewish men do before their 13th birthday. This knowledge made him accountable. His knowledge of the law convicted him as a sinner and he spiritually died.
Paul had thought the law leads to life, but sin deceived him and used the law to spiritually kill him.
Sin is not imputed when there is no law. Babies cannot understand the law and so are not imputed sinners.