Does your scientific paper's being accepted by a prestigious journal worth fabricating it?

As is well known, Dr. Obokata was accused and fired for fabricating her paper on STAP cells.

Report on STAP Cell Research Paper Investigation http://ift.tt/1KNnJbn

I wonder what her motivation was if that is the case. If STAP cells do not exist, sooner or later her paper will be recognized as invalid by the science community. However, someone said your scientific paper's being accepted by a prestigious journal is prestigious enough implying that it could be a good motivation. Is this true?