What you would do if developers turn corrupt and force a new version with unwelcome changes? Most people see developers as some kind of robots, but cryprocurrencies are often fraud schemes where developers control the market.
You could ask what would happen if Cisco tried to force a new version of TCP/IP with unwelcome changes?
The comparison isn't quite the same yet, but it could be in the future and many bitcoin supporters think that's how it will turn out.