Please don’t lump the eems in with Deacons and especially Nuns. Deacons go to years of training in seminary before being ordained and Nuns have made a lifetime comittment to the church.
Most of the nuns involved in running parishes want to be priests, and so, alas, do most of the deacons (or at least they want to get up and preach). It’s true that most of the EEMs don’t.
My point, however, was that bishops of no-vocation dioceses have that situation because they think that the priest is actually no different from the deacon or the sister, not to mention the EEM, and this is the message they give to the priests by “replacing” them with nuns and deacons (and EEMs).