Yes I agree. There a costs for ejaculation that are often overlooked.
I wonder if Steve ever tested this, so I asked and suggested it here:
[Adultish] Did Steve ever experiment with sex transmutation / retention?
By the way, there are a lot of books that discuss the benefits of not ejaculating:
-Think and Grow Rich - Napoleon Hill
-The way of the superior man- David Deida
-Everything by Mantak Chia or Charles Runels M.D.