Raspberry Pi OS comes with a ton of stuff, among others, Minecraft or the "Pi Store". It is not a minimal building block for your custom hacked Linux firmware,

Raspberry Pi OS comes with a ton of stuff, among others, Minecraft or the "Pi Store". It is not a minimal building block for your custom hacked Linux firmware, it's what they provide so teachers can install the stuff and have kids use it without going to a console and editing sources.list first.