I disagree that's how it's promoted. You could make this argument about any piece of software (change the code to make it insecure, now look at the security hol

I disagree that's how it's promoted. You could make this argument about any piece of software (change the code to make it insecure, now look at the security hole!). If someone were to do this with Bitcoin, users can decide whether to use the old chain or the new chain. Unlike a centralized service, no individual (or even group of people) can prevent you from using the version of the network you and your peers want to participate in.