Just based on the text of your post, I see an error, or at least something to question: The passage you quote doesn't say anything about the Trinity "has to" do anything. So it seems to me that what we have is misplaced outrage.
No need to worry about misplaced outrage, Dear Heart MD. There's gotta be plenty to go around!
Mostly joking.
Seriously, the construction on reality I and my friend took is AT LEAST plausible.
Given the flesh . . . that's not concerning? The flesh chooses such 'realities' by nature, by habit, by desire.
And, if the contention is that RC folks naturally have less of a problem with the flesh than the rest of us . . . it's a return to guffaws to the max.