If Apple didn't actively block supply of spare parts, this wouldn't be as attractive as it would have been much cheaper to buy parts from the manufacturer than

If Apple didn't actively block supply of spare parts, this wouldn't be as attractive as it would have been much cheaper to buy parts from the manufacturer than steal phones, ship them overseas and get (most likely) forced labourers to strip them for parts and ship back. It Apple's corporate greed that fuels that and government corruption that allows it.