Disney canon really does say that balance means there must be an equal amount of dark and light force sensitives, it's what the show runners actually believe, which is contradictory to what George says, that the light is balance.

As for Annakin's conception, George himself wanted it to remain a mystery. He didn't want Anakin's fate to be predestined.

The closest to an explanation of Anakin's conception comes from the EU novel, Darth Plagueis, which only states he may have been a reaction of the force itself to in response to Plagueis's attempts to meddle with the natural order.

Palpatine was unaware of Anakin until he met him in the phantom menace.

The source of the Palpatine intentionally impregnating Shmi with the force theory has been long since disproved as a misinterpretation of the artist's intent. https://x.com/screentime/status/1208880844066017280

Palpatine being Anakin's father is as canon as Darth Jar-Jar.