Because big companies destroying value makes the world worse? They're sucking up capital and not delivering anything to justify it.

Won't investors just learn to avoid investing in companies like that?

With passive investment everyone is buying crap all the time because they have no ability to discern what is or isn’t crap and the base assumption is 95% of stocks are losers but the other 5% win big

are you too young to have lived through the multiple recessions that have happened in the past few decades or Bernie Madoff or Enron? Or Theranos and FTX? and that's just off the top, give me ten minutes to dig in and I'll get you at least twenty more

None of those were the result of mergers.

Pedantic. The point was "aren't investors rational" and they clearly hop on short term fads to their and our detriment. Plus saying Enron wasn't a product of a merger is very funny

Would you like to buy some tulips?