When a scientist says "an explanation for X could be Y" it shouldn't be interpreted as "here's a guess, I want it to be true and am undermining science", rather it's a sign they are being extraordinarily careful but they're reporting that they have observed some evidence which appears to agree with a given hypothesis.

Also I suggest reviewing high school biology, glycolysis isn't simple the breakdown of glucose into simpler molecules but involves many seemingly complex stages of isomerisation and reactions which are shepherded under specific conditions within various enzyme's active sites.

Consider reading the paper for more information: http://msb.embopress.org/content/10/4/725