SERMs do not work or do not work well if there is a major problem is with the pituitary or the testes.
Study the side effects of SERMs.
Excessive LH levels induced by SERM use may lead to LH receptor down regulation/dysfunction just as with high dose hCG; which would be a disaster.
Note that hCG levels are quite steady because of a longer half life. LH has a short half life and LH is released in pulses. I have read that steady LH levels make the testes unresponsive. That seems to be a paradox, but it is what it is. I can't recall how such data was obtained, might be animal models.