Because they make products that are harder to replace with a better alternative. (they have a moat/lock-in). Anyone that has built a moat/lock-in will, sooner

Because they make products that are harder to replace with a better alternative. (they have a moat/lock-in). Anyone that has built a moat/lock-in will, sooner or later, screw you over. Hammer manufacturers would too, if they could. But hammers are simple devices.