Excellent observation again!Again, you're requiring evil so God can show His goodness.
GOD does not require evil for any reason. Evil is anathema to HIM, HE cannot abide it. HE cannot create it nor create sinners by any means:
GOD is light. Light cannot create darkness.
GOD is love. Love cannot create evil.
A good tree cannot put forth rotten fruit, Matthew 7:18 A stream of life giving water cannot put forth salt or brackish water, James 3:11...
NO ONE inherited any sin, sin nature, evil propensity or liability for sinfulness from Adam!!!
Sin is only accrued by a free will rebellion against GOD or one of HIS commands.