When Jesus saw his mother and the disciple there whom he loved, he said to his mother, "Woman, behold, your son." ~ John 19:26
Using your interpretation style of Scripture, I would conclude that women are immortal, since what you've quoted from Romans says that death passed upon all men. But you'll say that "men" means humanity in context - ok, fine. But then why can't "by one man" mean one member of humanity - Eve? With your little authority-free system, we'll disagree and both think we are right. But I've got 1.15 Billion people and 2000 years of history and the promise that the Gates of Hell will not prevail against His Church - thank God for that!
You can exercise your freedom and believe that all you wish but you have to rebel against the word of God that was in the hands of the forefathers of the church in Rome to do:
"12Wherefore, as by one man sin entered into the world, and death by sin; and so death passed upon all men, for that all have sinned ... 14Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam's transgression, who is the figure of him that was to come. 15But not as the offence, so also is the free gift. For if through the offence of one many be dead, much more the grace of God, and the gift by grace, which is by one man, Jesus Christ, hath abounded unto many." [Romans 5:12-15]
I sure thank God for that! Actually, God sent His Son to die and be resurrected, which proves that the Gates of Hades will not prevail against His "called out ones." This is our "blessed hope," right?
But I'm curious...what do you, personally, think that promise means?