Apparently the harvesting procedure typically (but not always?) involves general anesthesia. That alone is never entirely risk-free. In this context, the temporary loss of bodily autonomy could be particularly problematic. All that comes on top of the required hormone treatment. It's not a trivial procedure.
On the other hand, it may be a useful tool to resist expectations to become a mother until it becomes socially acceptable to say no. So it might be important even if the eggs are not getting used.
This is the best argument against early egg retrieval. If it were just a matter of money, the argument holds. However, the treatment involves pumping you with hormones that make you feel like crap the week before and after. Almost daily bloody draws are involved.
Then you add potential complications from anesthesia and the egg retrieval itself, and you have a net negative expected value.
The first time my wife underwent egg retrieval, the surgeon accidentally pierced her ovary. She has had pain on that ovary since.
There's no way it's a worthwhile investment to invest thousands of dollars and take on significant risk and discomfort just for a tool to "resist expectations." You should invest that in a therapist. Or moving to a different state.