it's just that there is a degree of "stickiness" with these old ideas, especially if the current modes of operation still exist to benefit from such ideas. nevermind that there is a flourishing change in the whole scientific terrain; as such are still being used to fit the habits and appetites of the old and tired modes.
admittedly, things are changing. soon old paradigms will wither and die, or will just shed some few old layers of skin. but vestigial institutions and ways of thinking will remain to hamper down on how things will operate and how we think about things later on.
the challenge of a new paradigm is not just to show a better and more effective alternative to the existing paradigm, but to also challenge those who benefit from the old on their own playing field. like all changes, it will be a painful and perhaps a bloody one, as the old guard will always not give in without a fight.
and for old paradigms to finally fall, the new organism that it tries to control should be too big, too strong, and too uncontrollable that it will break the old definitions apart. as it appears, technological advancements and even environmental degradation might turn out to be giants tamed easily by the current, but ageing worldview.