Ruby Falls bills itself as a natural attraction, "Two hundred million years in the making." Most people associate waterfalls with the above ground, and to see one down there delightfully surprises them. It's like, "Wow, this isn't supposed to happen, but here it is, by itself in this big cave, and has been chilling here since longer than a I care to think about."
Which is why its a tragedy they make it so crowded, in-and-out, commericialised, and put in the lightshow and music and talking boxes and massive TV screen. That blows to pieces the loneliness and paradox of oddness and awesomeness. Gone also is the quiet sensation of walking in Lambert's footsteps, experiencing for the first time something big that no one's ever check out before, or been able to. You can't let yourself be suspend disbelief and imagine your group is the first, because there's all this stuff down there.
To imagine that the waterfall is fabricated, even if it only in part, removes any trace of the original value of going there. Not a shred left. Because then it's not doing it's own thing in there, letting you in on its own secret of itself for a little bit. It's not doing it's own thing; it isn't even its own thing; it's not even itself. There's no secret.
That's why if I got to own Ruby Falls for a day everything would change, and the presentation style would change to sheer minimalism. No kitschy stuff, no lights, no sound, no corny jokes. Just a lantern, or maybe motion-activated lights to keep the bit around any group lit up (but just the walkway, not the spotlights or anything) plus maybe flashlights for folks or kids in the group if they want. Small groups. Guides that are friendly and informative but mainly just get everyone together in the feeling of it, gets people to the place so that they can do the secret thing themselves.
Up above in the castle thing (which is pretty cool, considering all the rock came from down in the shaft/cave) there should be a museum on stuff found down there, as well as way more info on the hydrology in the mountain, which I know nothing about but which sounds neat. That'd be an awesome spot, if only they'd do it right.