Probably true, but I suppose it's some sort of cognitive bias rather than a conscious thought out of greed or similar motives.
"It is difficult to get a man to understand something when his salary depends upon his not understanding it."
E.g., look at religion. They can't all be correct. Fully rational people would surely want to get something so important right, so they'd work hard to discover the sources of confusion and sort things out. Instead we see religions and religious factions multiply. Thanks to fMRIs, we can even see that "what god wants" is just people "unconsciously" reading their own preferences: https://www.discovermagazine.com/planet-earth/creating-god-i...