Adam disobeyed a direct commandment of his Creator. Also there are three things relevant to this:
1. Satan deceived Eve into believing it was OK to eat the fruit.
2. Adam was not deceived by Satan -- by implication he was not present -- and therefore Adam was the one credited with having disobeyed (it may be that Adam joined in eating the fruit out of love for Eve, knowing her fate).
3. Satan knew that a forfeiture of the rulership of earth by Adam would result in Satan gaining dominion (and Satan has ruled the world system ever since resulting in the evil that is so evident in our history).
Why do we require a pardon for behavior we cannot avoid?
There are many ways to tackle this question. The simplest answer probably has the most truth to it. When Adam ate the fruit he became aware of evil. This knowledge opened him up to the temptations to do evil, the pinnacle being pride. This knowledge has been passed down to all of his descendent's. Adam and Eve's newfound pride immediately manifested itself in shame. Cain's pride caused him to murder his brother.
So, Adam's disobedience in eating the fruit led to our sin nature. Much like we all receive genetic characteristics from our parents, we are descendent's of Adam which passed on a sin nature (Jesus being the only exception not having the seed of man, being the seed of woman).
Gen 3:15 And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
Isa 7:14 Therefore the Lord himself shall give you a sign; Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel.
How is denial of these things an outcome of His love for us?
Considering the cold deadly universe we live in, recognizing how God sustains our world is wisdom.
Mat 5:45 That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.
Before Adam ate of the tree he had no knowledge of good and evil. How then could it be evil of him to eat the tree?
Adam disobeyed a direct commandment of his Creator.
So what? At the point when he disobeyed that commandment he was an innocent, and therefore incapable of sin. By definition he could not understand that to obey God is good and that to disobey God is evil because he had no knowledge of these concepts. I don't feel any closer to understanding the answer to this quandary than when we began.
Why do we require a pardon for behavior we cannot avoid?
[Snip exposition of Christian doctrine that explains why we sin].
Your answer that I have snipped is the answer to a different question. You have answered the question, "why is it inescapably in our nature to sin?", which is in itself an interesting question but not the one I asked.
I will ask the question again, at slightly more length, to make my quandary clearer:
We can no more avoid sin than we can avoid breathing or gravity. Christianity is quite clear that sin is an unavoidable part of the post-Adam human condition. Why then do we require a pardon for sin, when to sin is unavoidably in our nature? We are as we are and we can be no other, however hard we try. To make us beg pardon for behaving according to our nature is immoral. We might as well be made to beg pardon for being subject to gravity.
How is denial of these things an outcome of His love for us?
Considering the cold deadly universe we live in, recognizing how God sustains our world is wisdom.
Mat 5:45 That ye may be the children of your Father which is in heaven: for he maketh his sun to rise on the evil and on the good, and sendeth rain on the just and on the unjust.
I don't understand how denial of paradise (and of course many Christians enthusiastically believe something much darker happens to non-believers) to a section of humanity (the overwhelming majority 95%+ of those who have ever lived, if I understand your doctrine correctly) is an outcome of His love for us. To you your answers may address this question, but to me they come across as non sequiturs.