That is terrible logic. They have less exposure to personal tragedy for a given loss, but that does not in any way impact the market value of their loss. In fact, an investor experiences a real loss of assets (decreased net worth) whereas an unemployed person merely ceases monetary gain. The fact that your financial situation is dependent upon continual injection of capital is immaterial to the comparison of value lost.

If you're trying to make a social justice argument about capitalism as an economic model, that isn't relevant.