My real fascination with WDW has always, from the very first time, been how it works. My brain would see something and immediately want to know "how did they do that". I went on the tour once and, unfortunitely, had a newbee guide. She tried her best and was obviously nervous but without the confidence and the vast knowledge that other guides seemed to possess, we lost a lot.
The behind the scene stuff didn't bother me because I always knew that they had garbage to get rid of and things to repair and all the rest. I was enthralled with how things worked, be it trash removal or animatronics. It was all good. I loved finding out were some of the entrances and exits to the utiladors were. I look for them all the time now. Just like a hidden mickey.
I guess it is up to each individual to decide if knowing how will ruin the magic then, by all means, do not go. It will wreck it for you.