If it is one person in a blue moon, no problems.
But let’s have a look at it from slightly exaggerated perspective – so we can see it better.
Imagine one year, and every year after that, we get twice as many 70 y olds and older, as HSC 18, 19 or 20 y olds, taking up places at the universities.
On a surface we might say good on them, but let’s have a look at consequences of this.
Average life expectancy is around 80, and last few years some people are unable to look after themselves as opposed to look after community.
This would lead to national tragedy, because of shortage of educated people who would be able to provide services for 30 years or more.
(Could compare to IVF at 65)