As an engineer, to become a multi-millionaire, you need to get "lucky" by your small share of equity suddenly being worth a lot because of an acquisition or IPO. If that doesn't happen, you're not going to be a multi-millionaire. As a lawyer, you can easily become a multi-millionaire simply by doing your job at a respected law firm, and that doesn't require an acquisition or IPO event.
The top few fractions of a percent of engineers can become at least a principal engineer at a FAANG and be getting well over 500k a year in comp, similar to the numbers being thrown around for these clerks. That was mainly my point, not talking about startup exits.