Given the graph presented, which is available from other sources which suggest that pretty low figures can cause muscle contraction, defibrillation and death.
Then given that some standards are allowing leakage current that can be higher than those figures and could potentially in a weaker person, a person with a heart condition or a pace maker cause heart failure one might be scared.
However are we all not forgetting the resistance of the skin is usually measured in mega ohms? Dry skin circa 100M, wet/broken skin 1M. If you get shocked by high voltage arc'ing burnt skin becomes much lower resistance down to 500Ohms.
https://en.wikipedia.org/wiki/Electrical_injurySo while 600mA can kill you, it requires you experience a shock where 600mA actually flows through your body, including the skin resistance and the full resistance through your body to the current exit point. Then it becomes a matter of ohms law. It's difficult to get even ball park figures for a complete shock path. I have seen internal resistance of 600-1000Ohms, but the initial resistance of the skin can be 100 times that.
So worse case of only 600Ohms, you would need V=IR ... V=0.6A * 600Ohm ... V=360V
That is awfully close to mains voltage.