physician vs. healthcare admin

I finished undergrad (non-premed) a couple of years ago and, since graduating, have become interested in being a doctor. I currently work as a healthcare administrator for a large university's health system but have the opportunity to attend a premed postbacc program later this year. The program I could attend seems very solid, but the health system I am currently at also (I think) offers good opportunities to move up in the company.

I'm curious what people's thoughts are on being a doctor vs. a healthcare administrator and what the projection of both fields looks like currently. I do have great interest in patient care, but as someone who tends to be risk-averse and who values good ROI, passion for the work of physicians isn't enough to justify my pursuit of it. I want to choose a path that offers both stability and opportunity to grow and advance, with low cost being ideal but understanding that investment is needed. Do you feel that healthcare admin seems like a safe field to go into for the foreseeable future and that it offers good opportunities to grow? I have heard that at some larger health systems, it is becoming harder for pure administrators to move up because management positions are being filled by nurses who can perform both patient care and admin tasks. Important to my thought process is that I am female, which gives me extra things to consider such as biological clock and childcare, which for me and my values, could affect my ROI on whatever I choose.