That's a rose-tinted view. All of the things you list as investor-friendly involve exceptions whereby the government fails to swipe money from you.
The effect of policies that tax most investment scenarios is to discourage investment because it reduces your options. Consider this situation: you think that the drop in the ASX is unjustified and want to speculate on this. You're discouraged from doing it: even if you pick it right and provide liquidity when the market is dropping, they'll tax your upside when you to exit. That is, unless they sit on it for those periods, which discourages the first interaction because on that kind of trade you're not necessarily going to want liquidity tied up for a long period.
You get all the risk, but in addition the government eats into your upside.
A quirk of the Australian arrangement - non-residents aren't subject to capital gains tax. This puts them in a better position to supply liquidity in opportunity times, which some people consider the current market to be.
The effect of policies that tax most investment scenarios is to discourage investment because it reduces your options. Consider this situation: you think that the drop in the ASX is unjustified and want to speculate on this. You're discouraged from doing it: even if you pick it right and provide liquidity when the market is dropping, they'll tax your upside when you to exit. That is, unless they sit on it for those periods, which discourages the first interaction because on that kind of trade you're not necessarily going to want liquidity tied up for a long period.
You get all the risk, but in addition the government eats into your upside.
A quirk of the Australian arrangement - non-residents aren't subject to capital gains tax. This puts them in a better position to supply liquidity in opportunity times, which some people consider the current market to be.