Second, any actions by officers without bodycam footage should invalidate qualified immunity and any officers' testimony should be largely disregarded.
Third, lack of bodycam footage should give strong negative inferences in any civil trial where the police are defendants.
The police are incredibly bad at their job, when they even do it, which isn't that often. They are vastly overpaid. They routinely lie on the stand. This happens so often there's a term for it: testalying. They plant evidence. They routinely kill bystanders and then 19 of them cower in fear while one gunman is allowed to keep killing children (ie Uvalde). They steal from suspects. They abuse civil asset forfeiture for more (legalized) theft. Pretty much all they do is harass and commit violence towards minorities.
If any prosecutors dare prosecute any police for their crimes, they'll suddenly find that police witnesses in their case mysteriously start missing court appearances, tanking that prosecutor's conviction rates, which is really the only thing they care about.
Some police (eg the LA County Sheriff's Department) are essentially criminal gangs [1].
[1]: https://www.newyorker.com/magazine/2022/06/06/the-la-county-...