You're right that that is assistance, but how is literally forcing someone/some corporation from assisting someone not forcing the end result of them remaining

You're right that that is assistance, but how is literally forcing someone/some corporation from assisting someone not forcing the end result of them remaining pregnant? The idea of the 'natural course of events' is doing a metric ton of heavy lifting here for your argument, where does something begin or end being the 'natural' course of events? You can argue that 'natural' includes all the biological processes of living/dying, becoming pregnant/giving birth, but why doesn't it include the other biological processes of other human beings deciding to exert effort to provide assistance that are opposing the other biological process?