The 51% miners would, in my version of the attack, switch to a chain, which is more profitable for every participant (eg. they add 1 BTC to every address) - and they would continue to include transactions nto the chain. So there is a monetary incentive to switch to the spawned chain. It may take a while, until all wallet users switch to the new chain, of course. So it is a matter of speed of adoption.
You must be one of those something for nothing kind of thinkers huh?
It is by definition IMPOSSIBLE for the new chain to be better for everyone. Money is just an abstraction. If every address gains 1 BTC you haven't increased the wealth merely the accounting system and existing holders of wealth will see their wealth reduced by dillution. There is always a winner and loser when manipulating the financial system.
I mean by your logic I could make a chain which gives every address AND ever future address 11 quadrillion Bitcoins each. Obviously that will be the best chain. Don't you want to be a quadrillionaire? Who doesn't man.
Your new chain would have no value. 1 BTC or 1 quadrillion BTC it only has value if someone wants it. Nobody will.