Because the NSA, CIA, and FBI love them. Vault 7, Magic Lantern, Intel ME and AMD PSP, Dual elliptic curve, COTTONMOUTH-I, ANT/TAO catalog, etc.
Hell, Microsoft willingly reports vulnerabilities and exploits to the government for them to use.
North Korea wishes it had this level of control on the goods its citizens willingly buy.
Day 1234 of "We're working on a ceasefire" and mass grave #999 of "We're trying to minimize casualties"