Why would the visor show a fake image?

I saw some people saying "to trick them into cleaning the camera" but that doesn't make any sense. The people who wanted to get out thought they were being lied to and that it was safe outside, meaning the projections in the coffee room were fake. Once they get outside they see the "green Earth" in their visor and genuinely think that's reality, so they are now vindicated in their belief that the camera isn't showing reality to the people inside and they are just seeing a fake image.

So why would they clean the camera then if they think the whole thing is faked? It makes no sense whatsoever.

This is part of this series that I think you just have to accept non-critically.
I mean, logically, if they needed someone to clean the lens, that could be
easily solved just by sending someone out there quickly to clean the lens.
Or, the designers of the Silo could have just made the camera lens self-cleaning.

From watching all the episode so far and having read the books too ( I think
there are very few Moviechatters who have read the book ) there is a lot of
depth to this series, and it is just starting to come out at the end of S2.

They plan to have 3 more seasons from what I have read, if it lasts that long.
I think besides some strong legitimate criticisms about the pace moving so
slow, it's a very interesting story with a lot to say about human society too.

I can say definitively it is not like Lost, and questions are answered, but that
is what the series is about. The first episode of S2 really bugged me because
to me most of it was Juliet putzing around in the dark - pissed me off, like the
episode in S1 where they worked on the stupid generator.

The visor thing as it is shown in this series is impossible, at least with today's
technology, but the point is that when someone living in a brainwashed society
like the Silo goes out the door and sees a world that is completely different
from what they see in the monitor every day, they are supposed to think that
the inhabitants of the Silo are not seeing clearly and that cleaning the lens
will change that.

And the whole idea of basing an entire society on never questioning the outside
or saying you want to go out is hard to swallow. So, you have to take a certain
amount of this on faith and just go with it. There is a lot to be revealed, and
there are answers though - at least there were in the book.

All of these shows have loads of unlogic details in them that just don't add up.
You don't even have to go into details like fake images on visors and the question whether that makes sense somehow, the fundamental flaws are much more basic.
In a world as destroyed as the outside of the silo is shown, there wouldn't be enough oxygene for people to survive and there wouldn't be enough raw materials to maintain the technology under ground.

These shows all start from an apocalypse, then pick a couple of details that might develop some temporary solution while people wait for the aftermath of the apocalypse to settle back into a habitable planet, but they all fall short on the overall picture.
It's like teleporters in Startrek or similar shows, physically impossible, but you have to accept them as part of the fiction because without teleporters the show wouldn't be possible.

these people lived underground , and they have never seen any grass and sunshine (not even in books or pictures). The idea is that seeing grass and sunshine for the first time is so enrapturing that they all end up cleaning when they don’t have an intention to do so