> Neither databases nor the construction industry are leveraged 10x+.
Leverage is not the sole determinant of risk. Wildcatters are far riskier than someone who is 10x leveraged and holds 2 year notes.
> Neither provides fundamental utility to other sections of the economy through lending activity, which can result in liquidity events at otherwise perfectly solvent firms.
You picked the method of harm that is unique to finance. I could just easily claim that bankers will not build faulty levees or cause untold harm to the planet.
> Neither can drive prices in other sectors through speculation in financial instruments or through financial reporting and reporting downgrades.
It's not obvious to me that this is a method of harm. If oil is underpriced in the US and overpriced in Europe then buying one and selling the other will cause a shift in prices. Arguably this is a benefit because now everyone is paying/receiving fairer prices.
Regardless, bankers are neither traders nor research analysts so I'm not sure how relevant this is.