Exactly. Some of the licensed collectors won't even look at the accurate stuff, which we, the "rivet counters", are interested in buying. They are happy with their licensed stuff, with a nice edition plaque, shiny display case, and COAs. They want to play safe, and to be sure what they own holds value for resale. They are not even slightly interested in the idea of researching for a more accurate prop, or how that screen used prop was made in the first place.
They might even consider the unlicensed stuff inferior, due to the lack of those shiny trinkets listed above. If you show them a good accurate fan made helmet, a nice blaster/lightsaber/prop made with original parts, or a true studio scale they simply don't connect with them the same we do.
All this fine by me. More good stuff to remain to the people who care about them