I got the truth! It is because they are not able to date Taylor Swift!
Samson Mow: If the question is why can’t Core compromise and add a hard-fork into SegWit? That’s because a hard-fork requires everyone to upgrade simultaneously and Core cannot force people to do that. It’s an impossible compromise. It’s like me saying I’ll do something for you if you get me a date with Taylor Swift – you probably can’t do that.
Does this mean if Taylor dates him, he would compromise?
http://news.8btc.com/8btc-exclusive-charlie-lee-samson-mow-and-johnson-lau-talk-about-everything-from-the-hk-agreement-to-the-recent-consensus