This is a much more likely explanation but in all non-scientific accademic fields it's usually more important to come up with a narrative that's appealing to the general public or the political class than with an accurate narrative. Hence the explanation that makes the most sense but is less "Wow"-inducing will be swept under the rug.

There are plenty of fields where we entertain "mysteries" that have perfectly rational explanations but settling the question once and for all with a rational argument would dry up the funding stream for accademicians and could have other undesirable consequences on some countries' political narrative.