alt Hacker NewsOP has practically observed the effect of the Ego via software, but hasn't quite arrived at the ability to quantify it.
Read back through and apply every example given through that lens.
It is possible that we're in an industry that inordinately expresses this part of human nature, but I'm pretty sure it shows up everywhere though different anecdota. Apply a reductionist Zen Buddhist view to your professional creativity and all of this goes away.
Bob wants to refactor a subsystem because it will make him a hero, and if he positions it correctly to management, the technical merit and actual realized level of success will be irrelevant. Alice chooses to surface some obvious concerns and then sit back and watch the show. Jane chooses to throw her hands up in stand-up and try to emotionally convince everyone the sky will fall. Be like Alice and preserve your sanity.
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Being like Alice preserves your sanity on that level, but opens you up to significant issues in your future career and financial state. There's a reason why people who make a bundle relatively early in this world often pack it in and move to a farm or a job where they can enjoy the produce of their labor. They have a good choice to make without sacrificing more than they can afford, but that's not true of everyone at all times.
Or maybe he thought it was more effective to talk specifically about something he had actual experience rather than saying "it shows up everywhere" with no way to actually support the claim?