The point of the lowering testosterone wasn't to be a path into competing.
The point was that that was what "transwomen" were doing anyway - the original definition was supposed to be referring to "male-to-female" transsexuals who were undergoing surgery and/or hormone treatment, either of which kills testosterone. The "tru-trans", if you will.
So the effort was to prove that these males who were choosing to do this to themselves for personal reasons (because no-one would EVER dream of doing it just to get into sport), didn't have an advantage.
And Joanne Harper is presumably part of that tru-trans contingent and now somewhat taken aback that "trans inclusion" is taken to mean "any male".
Harper had a reasonable stab at showing the tru-trans male with lowered testosterone lost advantage, but has now conceded that that's not really true (Harper has a study backing up Hilton & Lundberg's work), but still argues somewhat that the advantage isn't "too much".
But this idea that a totally untreated male could compete with women is obviously preposterous, too far for even Harper, and not what Harper wanted. Harper wanted transwomen like themselves to compete, not any male.
I agree that the IOC may effectively be digging us out - correctly concluding that a not-medically-required treatment being a precondition for competing is unethical. So that goes, and with that gone, there's not even remotely a grey area. You just divide on sex, and ignore hormones.