This is a mistake many Year 12 students make. Don’t fall into the trap of thinking that you’re ‘wasting’ your ATAR if you don’t squeeze every last decimal out of it to get into a course (especially one that you may not even be that interested in).
There’s no point starting a course that you only applied for because it was highly competitive. You’re less likely to succeed if you’re not passionate about the study area.
Besides, no one will even care what your score was in a year or two and ATAR doesn’t define you or your future. In fact, this is one of VU’s core beliefs – that’s why ATAR is no longer a consideration for many VU degrees.