I agree. In D3 I only did ubers for crafting the amulet if a build I played used it. It wasn’t something I ran 24-7 to get gear. I could get gear,really good gear from any activity. Not so in D4 it is boss runs or IH or getting the tribute for Kurast that might give you a mythic.
In 6 seasons of D4 I have only gotten 1 mythic, it was in season 5. The only way I got it was maxing the seasonal reputation on 4 heroes and crafting it. I have never had a mythic just drop. It is totally disenfranchising in a loot based game to never get the top end loot.