Let me state my opinion more directly.

I'm for developing as much of deep fake technology in the open so that people can internalize that every video they see, every message, every speech should be initially treated as fabricated garbage unrelated to anything that actually happened in reality. Because that's exactly what it is. Until additional data shows up, geolocating, showing it from different angles and such.

Even if most people manage to internalize just the first part and assume everything always is fake news, that is still great because that counters propaganda to immense degree.

Power of propaganda doesn't come from flooding people with chaos of fakery. It comes from constructing consistent message by whatever means necessary and hammering it into the minds of your audience for months and years while simultaneously isolating them from any material, real or fake that contradicts your vision. Take a look no further than brainwashed Russian citizens and Russian propaganda that is able to successfully influence hundreds of millions without even a shred of deep fake technology for decades.

The problem of modern world is not that no one believes the actual truth because it doesn't really matter what most people believe. Only rich influence policy decisions. The problem is that people still believe that there is some truth which makes them super easy to sway to believe what you are saying is true and weaponize by using nothing more than charismatic voice and consistent message crafted to touch the spots in people that remain the same at least since the world war II and most likely from time immemorial.

And the "elite" who actually runs this world, will pursue tools of getting the accurate information and telling facts from fiction no matter the technology.