I have mixed feelings about religious units and the religious victory. All of the recent Civ games (4, 5, 6, not BERT
) allowed the player to buy religious units to actively spread the desired religion. Both Civ5 and Civ6 allow "inquisitors" to remove unwanted religions from the player's cities. All of the main franchise games also had passive ways to spread religion, using variations on the idea of religious pressure or natural spreading. The perception / opinion about whether one finds directing religious units fun or tedious will vary from person to person.
It makes sense to me that since Civ6 added a Religious victory condition, that a player (either human or AI) would need to take active steps to pursue that VC. It further makes sense that a player (human or AI) might need to take active steps to defend against another player who is pursuing the VC. It's analogous to what we need to do when pursuing a military victory or science victory -- be active, either on offense or defense.
Here's where my mixed feelings come in: I'm not yet sure if I find the RV to be a fun victory condition. I'm not sure if I want Civ7 to have an explicit Religion victory, or whether religion should play another role, e.g., diplomatic modifier from Civ4 or source of faith yield to be used for other things as in Civ5.