There are plenty incentives to including imaging as part of black boxes. Nothing unreasonable about it. It would help elucidate several non-UFO normal life kind of incidents.
Just because things are as they are, doesn't mean that they couldn't be better.
But regulators do revisit existing rules all the time. If you really want this then feel free to file a formal petition for rulemaking. If you do that then they'll have to at least look at it.
https://www.faa.gov/regulations_policies/rulemaking/petition