You seem to have turned things around here.
In those examples the naysaying skeptics were the ones defending the currently accepted orthodoxy.
Just as, today, the JREF-type skeptics defend the currently accepted orthodoxies.
I think Chopra is quite right to say that people of that cast of mind haven't made any major scientific discoveries. I certainly can't think of any.
They're much more about defending accepted theories and thereby perhaps having a bit of that prestige rubbing off on them. Certainly they enjoy the sense of power to dismiss and ridicule they think it's given them.
It's an eminently safe approach to take, but nothing much new gets discovered by keeping your ship within the harbour walls.
pj - I would respectfully argue that this is not really the full story! Sure, at the micro-level, most of us scientists are worker drones, moving within the confines of currently-accepted theory, but on the greater level (the forest and not the trees, if you will), it is this very system of consistency that allows for advancement. We have to agree upon a certain framework (which includes all of our language, terms, operations, etc.) within which we will operate in order to get anything done on the grander scale (that is, as a team), and only when we work on this larger scale do we find the large anomalies in our theories, which, of course, are the places where the real innovations and discoveries take place. Science is mutable, but we only adapt our theories when we 1) have reason to, i.e. our current theory is not working accurately, or consistently, or universally, and 2) when we have something better to replace our old theory with.
So, in a way, while scientists bear the burden of being constantly considered mindless and conformist drones by the more "liberated" folks, it is good that someone is holding the fort up so that all of this progress can take place.
On a side note (not directed to pj specifically, but just out to the ether (haha) in general), as a student and teacher of science - it so bugs me that folks think scientists aren't creative. For example, my background is in physics, and yes, learning, say, the rudiments of classical mechanics is very rote indeed, but when you are up late trying to derive some godawful relationship or other, trust me, your skill at finding and conjoining abstract and divergent ideas (in other words, your creative skill), or, conversely, your lack thereof, becomes readily apparent!
P.S. Chopra = Jack + Ass