Yes, however a front facing camera can hurt you too.
That's true, but I'm talking about a different kind of hurt. I can easily control what happens with the front camera by ensuring I stay in my lane, don't speed, obeying traffic laws, etc...
Read (especially the section on comparative negligence):
https://www.valuepenguin.com/fault-or-no-fault-accident-decision-affects-auto-insurance-claims
If your state or country does not use "comparative negligence"(awarding a certain percentage of fault to the driver), I do not expect it to be an issue.
I can picture the other driver's defense lawyer making the following arguments with an interior cam, especially at locations that use some sort of comparative negligence(awarding a certain percentage of fault to the driver):
1.) You blinked too long (or too much), which could have affected your judgement. Your blink was more than the standard average human blink reaction time.
2.) Did you pick your nose a few seconds prior to the accident? If you did, then it means you may have been partially distracted and both hands were not on the steering wheel for you to take evasive action to avoid the accident even though the other driver may have been at fault.
3.) Did you change the radio station, increase or reduce your A/C or heat a few seconds prior to the accident? If you did, then it means you may have been partially distracted and both hands were not on the steering wheel for you to take evasive action to avoid the accident even though the other driver may have been at fault.
4.) Did you open a bottle of water, drink water, hot coffee or tea? Same as above. Depending on how deep they go, it could even lead to them estimating the temperature of the coffee/tea at the time of the accident that you got from Starbucks, McDonalds, or Dunkin Donuts.
5.) And possibly many other random shenanigans that they can bring up to reduce or absolve them from paying claims...
Distracted driving is a specific type of inattention that occurs when drivers partially divert their attention from the driving task to some other activity (picking your nose, changing the radio station, opening a bottle of water, drinking water/coffee/tea, etc...).
Even though the other driver may have been at fault for the accident, I can imagine their defense bringing some of these claims.
And of course if you did not do any of this things, it can also clear you as well.