There are two main reasons why those numbers are skewed and incorrect.

1. Mojang/Microsoft can’t legally keep tallies of players under the age of 13 due to COPA regulations, so that demo is underrepresented
2. Those numbers include Java metrics which contrary to popular belief, are absolutely dwarfed by Bedrock players.

Bedrock players are Mojang/Microsoft’s target demo. They spend more money (with both realms and the marketplace) and purchase more merchandise.