No, that's wrong model.
Authorities have always misled us. There was no time in the past when authorities would be truthful.
What changed is us, our access to information and our ability to shout out whatever you want and reach another person on the other side of the world.
> That's not to mention that it's gotten easier than ever to falsify evidence using technology
Again, not true. It is easier than ever to point out untrue. With so many data points on every event it is very difficult to completely falsify a piece of information. You can fake somebody saying something publicly but you can't easily ensure there were no 50 other people who have recorded it in some other way.
You say you can fake photo. You had NO photos back in the past. Police did not have cameras on them. A lot of events were not recorded or the records were not easily available.
There was only a very, very short time where data was easily available for everybody but the tools to subvert it at scale were not yet usable.
What happened is that there is more information noise that completely overwhelms most people who don't have "mechanism to sort true from false". In the past you would have other people sort true from the false for you (say television or Catholic Church or whatever organisation you have trusted) but there were not too many of those organisations. If those organisations lied and were caught it was possible for enough people to remember that.