"The “attacker” doesn’t need to cause harm to the majority (only to whom ever is the victim of the double-spending), so why wouldn’t the majority want to recognize their ownership of their free airdrop?"

How is this any different from what anyone can do without attacking the network? Create a copy of the software with some divergent property to create two chains. If the diverging property is seen as valid by some percentage of users, the divergent chain has some value. Do you have some solution to this as well?

There is little to no risk to creating a fork out of thin air such as in the case of Bitcoin Cash and whatnot, but there is a huge risk to creating an on-network fork - namely nobody cares about your fork and the value of your money from the main chain is destroyed. From there you must devolve your argument into what amounts to mind control. Do you really believe some nameless, faceless identity has a chance to sway users over the people they interact with daily on which chain is honest? And all this over trying to get their side of a double spend to complete?