It's kind of like defensive driving. No I shouldn't have to take all these precautions because others should be following the road rules... but very often they don't. If you're in a crash and you're "in the right", you're still in a crash (as my last concussion can attest to...).
Likewise if someone is being a prick to you, sometimes you've just gotta be the bigger prick right back. No you shouldn't have to be, people should always be nice and respectful... but they're not. Most people back off, and if they don't - you've learned the valuable lesson that the person is beyond reason and you can wash your hands of it right then and there.
It's kind of like defensive driving. No I shouldn't have to take all these precautions because others should be following the road rules... but very often they don't. If you're in a crash and you're "in the right", you're still in a crash (as my last concussion can attest to...).
Likewise if someone is being a prick to you, sometimes you've just gotta be the bigger prick right back. No you shouldn't have to be, people should always be nice and respectful... but they're not. Most people back off, and if they don't - you've learned the valuable lesson that the person is beyond reason and you can wash your hands of it right then and there.