There are quite a few disadvantages of doing med science as a pathway into med, which is why many people don't advocate for it.
1) Universities will advertise it as 'a pathway into medicine', which is just false. Every year, only around 10% of students applying for med will get in, which is a very slim chance. Because of that, there isn't anything special about med science which boosts your chances.
2) It is very competitive, where everyone doing it will aim for the best ranks and marks to hopefully get into medicine, so can be very stressful. On the other hand, if you were to do another degree to try get into medicine, many people would just try to 'pass' their course, so it is much more collaborative and can increase your chances of getting a higher GPA/WAM needed.
3) There aren't many job prospects after the degree, so if medicine for those students unfortunately doesn't work out, they may find themselves stuck with nothing to do after graduation.
Unless they actually enjoy the concept of medical research and want to pursue this after university, many students who do it as a stepping stone into medicine will end up at more of a disadvantage. Honestly, I would stay away from it and pursue a degree you enjoy instead. If you want more information, I'd read this thread -->
https://medstudentsonline.com.au/fo...-leavers-and-other-medicine-applicants.32824/