I never bothered with Mythic dungeons since their introduction in MoP. Then they just seemed like speed runs that were a little harder, that concept didn't appeal to me, and i was ok not running them. Same basic story for WoD, i had little interest in doing them. Now comes Legion and it seems interesting, mostly due to the fact anything worthwhile are linked to them.
Some of the later artifact quests are tied to them, Court of Starts and the Arcway are Mythic only, and all of the Legion dungeon achievements require them to be done in Mythic. So why isn't Mythic an option in the Dungeon Finger tool?
Im not trying to start a flame war or even talking about Mythic+, i am just curious why this decision was made if anyone has an idea as to why.