Never went to uni.
Like it or not, some people will never own a home. Some live in rentals all their lives.
The problem is there are not enough homes to buy or rent. Who builds the rentals?
Investors.
And if you punish the investors with too heavy taxes, the rentals don't get built.
I guess I should consider myself lucky. I bought my first house in Sydney a few months after I got married in 1972. As the manager of a bank's computer centre, I got bank finance. In 1978 I was transferred back to Melbourne, where I bought my second house.
I paid that house off with my long service leave pay when the bank amalgamated and as an employee of the minor partner, I was retrenched. I had worked for the bank for 29 years. I still live in that second house, so increasing mortgage interest rates or rentals don't affect me.