Do you think tech doesn't have these problems? I suspect you're going to say that you've never personally seen it, but culture can vary a lot from desk to desk in finance.
Stereotypically, you have cash equities at one extreme and exotic derivatives at the other. Outside of banks, the culture at an HFT firm or quant hedge fund will be completely different from the culture on a "bro-y" bank desk.
Yes because tech is much more culturally diverse, with large amounts of immigrants and second generation children of immigrants. If you've ever worked at a large tech company, you would know that the average team is very quiet because of the cultural barriers. The few Americans on the team are very introverted and again have a slight cultural barrier even with each other because many of them are the children of immigrants. The frat % is undoubtedly much lower in tech (if it's even represented at all) compared to banking.
It's true I would never personally have seen it in tech, but I'll say that my wife has recounted this story to a number of my female friends with 10+ years of experience in tech, and their response is "Seriously? Wow."
Stereotypically, you have cash equities at one extreme and exotic derivatives at the other. Outside of banks, the culture at an HFT firm or quant hedge fund will be completely different from the culture on a "bro-y" bank desk.