Why would the governments of the world spend trillions of dollars covering up the true shape of the Earth? Why should they feel the need to hide the fact that the Earth is flat? I haven't seen this question answered and I seriously would love to see one.
cause they're not hiding anything the earth is a sphere

But flat-earthers believe that they and they alone
know the truth 
!
Hence Flat-earthers must close their minds to any contrary evidence.
Closing the mind to any contrary evidence is typical of people that believe in a conspiracy against their belief.
Many try to deny it, but then their arguments prove that they rely on a conspiracy against the flat earth. See Look at this:
Place of the Conspiracy in FET
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The existence of such a huge quantity of false information indicates the existence of the conspiracy.
Essentially the reasoning boils down to -
P1) If personally unverifiable evidence contradicts an obvious truth then the evidence is fabricated
P2) The FET (Flat Earth Theory) is an obvious truth
P3) There is personally unverifiable evidence that contradicts the FET
C1) The unverifiable evidence that contradicts the FET is fabricated evidence
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From THE FLAT EARTH Wiki, Place of the Conspiracy in FET.
It clearly states "
The FET (Flat Earth Theory) is an obvious truth" and "If personally unverifiable evidence
contradicts an obvious truth then the evidence is fabricated".
And it is well known that
Conspiracy theorists believe wild ideas because they want to feel special. This is confirmed by the number claims they make as to their "knowing
THE Truth!".
Flat Earthers are but one little group of
Conspiracy theorists but one of the worst but the have believe so many are lying to them.
Often presenting evidence against their belief simply strengthens that belief and this new piece of evidence is just added to the conspiracy.
So, they can never be convinced, but there are many here not "too far down the
rabbit hole" that might see any good contrary evidence we might present.
Well, now you have my long answer to "why?".