This discovery will not eliminate the motivation of many people who did not exploit this "secret" 
[....] but that does not mean that they will change their choice.
[....] but that does not mean that they will change their choice. Think of it like a big game of strategy. If you learn something new about your opponent's motivations, strategy, or assets, then you may have to change something about your own strategy.
Miners who do not have ASICBOOST woke up this morning with a brand new motivation to change the status quo, which puts them at a 20-30% disadvantage that yesterday they did not know existed. They will want segwit to pass so that Jihan loses his competitive advantage.
But how will they achieve that unless they add significant more mining capacity?
Good question. As long as Jihan opposes segwit, he can block its activation through the normal means, since he controls well over 5% of the hashing power.
So if that's not going to change, then the sooner we all realize it the better, so that we can implement the UASF (or whatever we need to do). And that will be more likely to succeed if the non-jihan miners have a vested interest in wanting it to succeed.
