Keeping an open mind is important and I agree that we should strive to do that. It's very important not to view things getting disproven as a personal failure or a failure at all, but as progress and enlighment.
It's also important to note that jumping on the bandwagon of new ideas is not always the reasonable thing to do. Rigorous research takes time and that's why sometimes it takes time for a paradigm to shift, but I think often (especially in modern times) it's not that scientists want to defend the status quo, they just require convincing evidence to accept a proposition and it takes time to gather that evidence through repeatable experiments and so on.
For instance, take the double-slit experiment. It didn't take a lot of time for it to lead to a paradigm shift, but people still needed to verify the data and to repeat the experiment.
It also needs to be pointed out that physics is one of those sciences where evidence is actually easier to measure and quantify which makes it less susceptible to problems with anti-progress predispositions while social sciences have a harder time with evidence, so opinions hold more sway and progress, consensus and agreement might be a bit more problematic.
RE: The Tao of Paradox | Part 1: The Only Thing I Know For Sure