I never claimed that you had to do the Guardian stuff no more and no less than, but exactly 100 times. What I said was that if you had to repeat something 100 times then doing it once or 50 times a day would result in the same amount of grind, the only difference being the number of days it would take to be done with it.
As for the exploration in ED, the fact that you can enjoy it sometimes doesn't make it it any less boring. If you like staring at the loading screen, do it as much as you wish. It's none of my business, and I don't give a crap about it.
But given that you apparently have a higher tolerance threshold against boring repetitive activities than most, I think it's a pretty bad game design to lock something behind such an activity that even you need a special mood to be able to enjoy.
In Skyrim, you have to fight yourself through a dungeon to recover the precious Enchanted Iron Sword from the boss container. For the special Blessed Daedric Warhammer sometimes you have to clear a multi-level dungeon. Were FDev the creator of TESV, I think the mission descriptions would read something like "clear this dungeon (consisting of two corners, a tunnel and a hall) of Draugr, then rinse repeat 15 times to get the loot".