Because "chicanery" is not an absolute for one. I had to look up the definition "the use of trickery to achieve a political, financial, or legal purpose." You could argue that plagarizing text is trickery to get a thesis out and finished, sure. However, if Waseda is anything like my graduate school, background text on things like stem cells were of nearly zero importance. It doesn't sound like she faked any results in her thesis, which is the only part anyone cares about.
Here was my recipie for my thesis, approved by my thesis adviser and committee: Take two papers you've already published, staple them together. Write up a third part in case I hire someone to finish the stuff you didn't. Get signatures, the end.
Theses are treated with great esteem in other graduate programs. In science, or at least biology, no one gives a shit about them. My thesis adviser heavily scrutinized the two papers making up the main part of my thesis, they got peer reviewed, but the third part probably got skimmed only by my thesis adviser. Everyone else likely didn't even open the document aside from signing it.
This is not to say "plagiarism doesn't matter," or that it shouldn't be punished, just that labeling the STAP cells as bogus because of that is an overreaction. It should and IS factoring into skepticism about the results, and it should be and is a black mark on Obokata.
As far as reproducible, it's still early. It's only a few months old. The
Knopfler blog is keeping track of some efforts that have failed, but if I recall, it took a year for induced pluripotent stem cells to be reproduced. The
detailed protocol was released only two weeks ago.
At this point, you can conclude that Obokata should face consequences for plagiarism in her thesis, and that the "easy pluripotent stem cells" headlines were misleading. You can also conclude that more skepticism and scrutiny is merited, though skepticism should be and already was high given how important it is. It's far too early to conclude that it's outright fraud or not science. I've been somewhat following the controversy, there's no smoking gun on the actual science yet.
Lastly, remember that these are scientists, not PR experts, politicians, or celebrities. Obokata went into hiding after this blew up, I think people smelled blood in the water from that and assumed something fishy was up and not, say, that she was overwhelmed.