Totally agree that bitcoin will not hardfork just because of Bitfinex.
The hard fork of Ethereum is necessary because DAO is the only important "Application" of Ethereum. However, in bitcoin world, Bitfinex is just one of the many many players and no one will care about it being hacked. After all, it was the system of the exchange that was hacked- Bitcoin has not been hacked before.
For me the hard fork of Ethereum would be exactly the same as a hardfork for bitfinex. Some people lost money, because they put too much trust in an organism, they are bitter about it and decide to change the rules so they can have their money back.
If big names of bitcoin were concerned, a fork would be discussed.