I have yet to see proof that it crashed.
Nobody has - that’s why they are still searching.
But knowing some of the ADF personnel involved in the search, I don’t believe they would be involved in any sort of cover up - not unless there was some compelling reason of national security that I cannot see any sign of believing exists.
When I was in the Navy, I certainly would not have done so, and would have spoken out if somebody tried to make me.
Because of the nature of the search, conspiracy theories surrounding this would require professional and honourable service people from a number of different countries to be involved. So I don’t think that’s likely.
It doesn’t mean the plane is in the Indian Ocean - I certainly would not rule out the possibility of error in analysing the data - it is based on circumstantial evidence, and logical reasoning based on assumptions. But if the data didn’t back up the reasons we’re searching there, a lot of the people searching would know that and would have said something by now.