>ambitious and smart people putting their talents in investment banking and management consulting
Honestly, I think that is a big factor (along with a reaction to perceived political biases) in why people think tech companies need to be broken up, beyond any real or imagined monopolistic practices. Silicon Valley really shook up the business world at an accelerating rate over the past 2-3 decades, and it's threatening to people accustomed to the status quo, especially those who invested decades of their lives into a career in [finance, management consulting, high-powered law/politics] because they thought it was the best way forward.
That, or we've already seen where this road leads: our best and brightest talent being used to make rich people richer. Nobody with a high-paying job in finance is losing that job.
Personally I suspect another aspect are ugly aspects of (high school) social order and anti-intellectualism. If the people they look down on start succeeding they get really mad.
Virtually nobody complains about bankers and businessmen taking their jobs with outsourcing and wasn't taken seriously. Automation and AI creating more productivity instead of just moving jobs? The "nerds" doing it? "SHUT DOWN EVERYTHING!" hysterical reactions and rage. If tech becomes involved in an industry suddenly it is the great satan like Tesla, or any of the artificial meat companies and spoken of as not a part of the industry in spite of larger and smaller existing players and even foreign businesses receiving more respect.
The mythical long lasting tech-bro insited as everywhere from countless hit pieces which hold homeowners blameless for rising rents along with other business jobs but engineers and programmers solely are clearly the great evil responsible for high rents.
It harkens back to deep feudalistic stupid where the peasants and aristocracy distrusted the merchant and miller for making money from working smart and being "anomalys" to the social order. Money not made through serfs or conquest? Clearly deeply unnatural and wrong. Just look at Belphegor - literal demonization of discovery and ingenious inventions. Judging by actions and impacts alone he should be an angel.
Honestly, I think that is a big factor (along with a reaction to perceived political biases) in why people think tech companies need to be broken up, beyond any real or imagined monopolistic practices. Silicon Valley really shook up the business world at an accelerating rate over the past 2-3 decades, and it's threatening to people accustomed to the status quo, especially those who invested decades of their lives into a career in [finance, management consulting, high-powered law/politics] because they thought it was the best way forward.