It goes without saying that things you can't comprehend are boring regardless of their actual content- nobody wants to re-read their favorite 1,000 page novel as a PGP encrypted string for example. It's also a fact that scientists don't have the knowledge to comprehend the interesting bits in a field they haven't specialized in. So there's no plausible route by which people could really know if a field they lack expertise in truly would be dull to them or not, even if it would in fact be dull: they must be assuming it to be dull despite a lack of comprehension. I could be wrong about the cause and effect, but I could not have reversed it. This raises the question of how people get into a field at all in the first place, when it's still gibberish to them.

To be honest though, I was merely generalizing from my own experience. I've yet to find any branch of science that didn't fascinate me upon close inspection- I've been in many situations where I had no real choice but to study something in detail which i didn't expect to be interesting but needed the knowledge towards a specific end goal. Every time it seemed initially dull and pointless while I was struggling with the nomenclature and basic concepts, until I reached a critical point whereby it became intensely interesting.

However, it's true that I've chosen to do inter-disciplinary work, and that could be due to me having some unusual trait whereby everything is interesting to me.