What we can all agree on is that the airports (up until this year) used to promptly pass their statistics on just fine for 100s of consecutive months.
No we can't - I think that you'll find that even in the "olden days", the monthly stats were incomplete, that's why they are described as provisional.
The people who do need to know these stats are the Public - that's who airports predominantly move. The Public would like to know if private airports and private airlines are being propped up in exactly the same way the Public like to be kept informed about failing schools and hospitals etc.
Most airports are private business - if you are saying they are being propped up, you must be aware of any tax funding they are getting (and the amounts, to do a decent assessment) - where is this available?