This is maybe the first dataset I've seen that clearly illustrates how margin (profit) is inversely correlated with value to humanity. Other than Ports, the top 7 highest-margin industries (stock/crypto exchanges, stock exchanges, banks, toll road operators, financial services and asset management) are in financialization and rent-seeking, basically acting as middlemen that use other people's money to extract wealth.…
While these are bogeymen, they do provide clear services that people need.
Banks should be obvious. A toll road is the worst offender in the list, it's tough to justify the eternal regressive tax.
The rest falls into financial markets. A steelman argument here could be that those services all make the power of compound interest broadly available. It's maybe the only exponential power available to average people.
I think there's a good argument that financial markets are a big reason that people can ever retire.