You say “He’s fully Man and fully God” yet you say He was not fully man because He did not carry our sinful side. Double speak?
He had to be born of sinful man (Mary) in order to inherit (carry) the sins of Adam. Our minds cannot comprehend totally how that worked but it must have for our salvation to be possible.
You’ve just denied that Christ was sinless.
Are you arguing that man was created to be sinful? Wow. That denies everything in Genesis which says precisely the opposite. Adam was cursed by God. To be fully Man this curse must be lifted, which is why Christ did not bear original sin and was free of the taint of sin.