The way they've reported on this seems a bit misleading. Isn't it just that the third-party repairers haven't reset the security mechanism after replacing the home button?
Ergo, Apple is bricking phones as some sort of misplaced revenge-like behavior.
Call it revenge like behavior is just you attacking Apple. It's certainly incompetent or unanticipated and poorly handled, but it's an attempt to maintain their security promises.
I don't know anyone who uses the fingerprint reader or the purchasing functionality.