Absolutely the Media control the folks and the narrative they want. This has been know for many years and many great writers have written on this. Chomsky is a recent example, but many older philosophers have addressed this through the ages. Yes you CAN find news from the Right IF you look for it. But the key is that you have to WANT to look for it; people very rarely do, especially if they have a tendency to the Left. The Left already dominates the Media, so you do NOT have to look for the news from the Left because that is the majority. The issue has been addressed and studied by many, many folks for a very long time. The folks tend to have their minds made up and gravitate to the news that reinforces their views.
It might be nuance, but the media doesn't "control" people, but it certainly tries to "influence" their way of thinking via propaganda & news filtering as I stated earlier, i.e. it "controls the information." "Controlling people" is a bit different than "controlling Information" , which is what the media does.
Humans always have the ability to explore, seek facts on their own (even in communist regimes). So they are not controlled.. And we as humans are not machines (that can be controlled).
The biggest question is do the vast majority people (sheeple) seek to use the ability to reason that they were born with ?