I think he most likely wrote it as a cover story for if someone found it.
And if not it is in line with what those 'boy lover' pedophile types think and say about children anyway, about how they're so beautiful and innocent and magical (while also wanting sexual relationships with them).
The World According to NAMBLA: Accounting for Deviance -
https://scholarworks.wmich.edu/cgi/viewcontent.cgi?referer=&httpsredir=1&article=1885&context=jssw
Look tenderly on little boys
Their softness as fleeting as a flower,
The cheeks like petals such a little hour,
The deepest dimple theirs so transiently . . .
Look tenderly on little boys.
That was a poem written in a NAMBLA (North American Man Boy Love Association) bulletin. If MJ wrote that people would think it was so lovely that he spoke like that about little boys.
People think this obsession with children and 'love' for them is unique, it's not, it's very common among a certain type of pedophile.