The demand for abortion is purely due to the availability.
I cannot truthfully say that is so. From the dawn of time, even in primitive cultures, some individuals sought out abortifacients and methods. But never in history have we had such widespread availability, with horrendous results.
I am probably older than you; I remember when it was illegal, and women sought out illegal abortions. I was at the elegant dining table of a prominent doctor one evening when he got a furtive phone call; his son (my date) explained that a family friend was looking for a referral to someone who would perform an abortion. Although this doctor would not have performed one, it did not seem to them an unusual phone call.
I wish abortion had never been legalized from the SCOTUS -- other than slavery, it has been the worst public policy in history; but I cannot see how it can be eliminated entirely, on a practical basis, now that 40 years of Marxist indoctrination have changed the expectations in a culture from Christian mores to a secular atheist free-for-all. But I also pray that my unbelief will be healed.
I would like to see Roe overturned, and return the matter to the states, where some states will restrict it severely or ban it outright. The job is still on us grownups to convince the younger generations of our own families and faith communities to plan their lives prudently and not fall for the temptations of casual sex. That is the smoking gun at the root of the problem.