I think the prisoners dilemma applies very well to bitcoin forks.  A game-theoretic rational thinker thinks:  If BitCoin players defect the reward is always better for the defector.  Because if:

 If you cooperate and the other defects, the defector gets the best outcome (In BitCoin that would be retaining all of the original chains coins and amassing the forked coins as well) So it is best to defect.

This though is not the best for you individually or for all players.   If all players defect nothing is gained(BitCoin Fails)

This cannot happen to BitCoin easily. Only a controlling force (centralized force) can change the rules so you cannot play the original game. For example government bans.

Superrational thinking assuming the other players thinking is Superrational knows that the worst possibility is when everyone defects. He would automatically cooperate to receive an assured reward although not the best possible.  So hard forks seem completely illogical.  That is ASSUMING Superrational thinking for all players. When the others thinking is unknown then that is where trust plays a part.  Once we convince ourselves this others will cooperate and we make a transaction with bitcoin and all parties receive a reward.  

This explains many things.  The defecting party (fork supporters) is going aftwe the biggest reward. The cooperating (bitcoin core) players believe enough players will stay on their team to be stronger and thus all cooperating players receive a reward.  

Quite amazing how deep the rabbit hole goes.  But I believe that BitCoin started a new economic game and is the controlling source of the game. The games is the blockchain and it is the largest and strongest.  Fear of weaknesses only should play a part in human error.  BitCoin is trusted because computers cannot deviate from the rules.  ALTs are fun mini-games within the game so all BitCoin forks just become alts.

Well that's my rant. The Superrational way to play is in a way less greedy. So although I'm late in the game its still fun I believe the segwit2x community is more selfish at a deep level.

Excuse formatting. On mobile