Because I have had so many tell me that the concept is “orthodox” and essentially, too difficult for a “Latin” to understand, and that there is no equal concept in the Latin Rite.
Ah! That!
Well, they are correct- it is orthodox, in that it is correct teaching, and not heretical.
However, it is certainly not difficult for a “Latin” to understand, no more than it is difficult for an Eastern or Oriental (or even this Lutheran here

) to comprehend. One just has to spend some time coming to know what theosis actually means; once that happens, one finds it all over the place.
And of course there is an equal concept in Latin theology! The CCC refers to it as
divinization. Perhaps a better way to think of it is this:
Salvation is a journey, yes? One is first justified, and then sanctified, correct?
Justification + Sanctification = Salvation
Justification + Sanctification = Theosis
They are the same thing, just different ways of describing it. Admittedly, talk of theosis/divinizaiton seems to have fallen a bit left-field (though not to the way-side) in Western theological talk. Nevertheless, it is there. Especially within the monastics and mystics.