Board Thread:Questions and Answers/@comment-7888499-20151022220452/@comment-27281875-20160409144333

Passing 1% is escaping alpha attractor field, not just changing worldline.

And in the story the Steins Gate worldline only known by Beta future Okabe and the others, so in alpha future, they probably didnt know what lies in Beta attractor field and not even know if there was a gap between alpha and beta attractor field.