That is the real question.

Miners are already colluding not to 51% attack, because of financial interests.
But ask yourself , what happens when the rewards drop and now they can't earn the majority of transaction fees with bitcoin,
because LN is being used for the majority of transactions.
At that point , their best financial interest will shift to BCH & BSV, as they do receive the majority of transaction fees on those networks,
once that happens, at some point it would be in their best interest to destroy bitcoin/segwit/LN so they have no competition.
And if you doubt the above, ask yourself why their are enough miners keeping BCH & BSV alive, and why they are not letting them die,
after all those same miners are mining btc/bch/bsv  , so thinking they are not preparing to dump btc at a later time is wishful thinking by hodlers that really are not good at thinking.

It is purely the art of war, miners protect BTC until it's profit margin fall, and then they will destroy BTC/LN to place BCH or BSV at the top of the markets claiming they were the real bitcoin the whole time. Problem with people like windfury, he thinks the miners are faith based followers nutjobs like him, the fact is they are cold hard businessmen, and they will sell your ass down the river for fiat profit.
BTC is a product/service , it is not a religion , learn the difference or suffer.