Lisa's first word is still a personal favourite of mine, especially now as a father.
Not everything, for example I read somewhere that chess "fight" in Tween Peaks was random and didn't adhere to chess rules because no one really paid attention to record or follow moves.
Perhaps they should have taught you to be less sure of that. So many takes in movies that ended up being the best one are where a punch accidentally did land, something is ad-libbed, a dialogue is mixed up, etc.
To take an example of a very critically acclaimed show: in Breaking Bad the only reason we got Jonathan Banks in the role of Mike is because Bob Odenkirk had a scheduling conflict, and Banks improvised a slap during his audition. Paul Aaron even complained about it indicating that he would not have agreed to it.
Pixar's approach to making their movies is a fascinating highly iterative process going through many story boards and internal showings using simplistic graphics before proceeding to the final stage to produce a polished product. I wonder how Simpsons do it.
The lucky break is first a result of a lot of planning and work - and it gets analyzed to death before included - and then probably re-inforced here or there elsewhere. (So that for me, I do notice when I hear movie or TV dialog as completely natural and said exactly right. It's exceptional.)
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I conjecture the most common underlying motive is to embellish cv, and climb the academic ladder.
The incentive would be money, maybe the pay for doing this test was not good enough.
Or maybe the scientist was motivated by thirst of discovering something good for humanity like cure for cancer and didn't want to get distracted by other things. Funding is also needed but angel bones are clearly impossibility. Why even spend time on disproving that? But if she had engaged in discussion with people clearly believing in this nonsense it would have taken too much time. Saying, the tests are inconclusive lets her be distanced from all this and allow people to leave her alone, mostly that the groups will continue their disputes among themselves.