There are tons of items that cannot be displayed to the public in fear of damaging them this can help to create a more accurate replica that can be easily displayed at a fraction of the cost.

Just so you know museums have been displaying replicas for decades (if not longer) as many items were too fragile to display, many "original" items that you might see in a museum are in fact replicas carefully crafted, some museums go as far as commission high end manual reproduction paintings if the original is too fragile to display.

And while reproduction paintings are rare natural history museums are filled with replica's those dinosaur fossils are not the actually fossils found in the ground, those are cast and hand finished to look good for the display and the casts often do not even come from a single fossil as a full fossil is almost a unicorn.