FTFY
If the cost of mining is $10 trillion per day and the cost of 3600 bitcoins is only $1 million. Miners will only be able to re-coup $1 million of that $10 trillion cost.
They need it if they wouldn't want to operate with a loss. And I can't imagine anyone wanting to operate with a loss.
As said before, some people can operate a little longer with paying for the losses from their own wallets and some people less. But eventually everyone will face the inevitable.
If an coin would cost 10 times less to mine, then there would be 10 times less the need to convert the coins to dollar. That coin wouldn't be so addicted to constant growth and it could handle stability during times when the flow of new money is scarce.
PoW mining is artificially making something expensive that should be cheap, by adding the cost of useless work. Useless work shouldn't be rewarded. The future of money is in efficiency, and PoW mining is far from it.