If poorly ran are the largest (and most successful) accounting firms.... then I guess?
It's just the type of work culture - which often relates to the industry you work in. The overall employee structure is overall somewhat of a pyramid scheme to a certain extent. It's often described as "Up or out".... meaning you're going to be working excessive hours, if you can keep up with it - you can easily shoot up to the top ranks (which are definitely nicely paid). If you can't keep up you're essentially going to be given the boot. There are rarely instances where you can maintain your position unless you have some kind of valuable rare skill.
Any company that makes you work more than 40 hours a week (and specifically ones that don't pay you for more than 40 hours) are poorly ran companies. I don't care how much money they make or how "successful" they are. That doesn't mean anything about how a company is ran.
Look at EA (Electronic Arts) which is the most successful 3rd party video game development company by a huge margin. Now go google them and you will read countless horror stories about what it is like to work for the company and how bad it is.
Calling it a "industry culture" thing is just an excuse that you believe because you are brainwashed. I work in software and many people think it's "normal" to work nights and weekends, especially in "crunch time". It's true for a lot of companies, but those companies are shit. I haven't worked more than 40 hours a week in nearly 5 years at this company nor do I ever plan to. And they don't expect me to, because it's a well run company.
All "crunch time" means is that management planned poorly and promised stuff quicker than it could be done, and now people have to rush and work more hours to get it done before the deadline. Had management planned properly there would be no crunch time since it would be running like a well oiled machine.
In job interviews one of the first questions i ask is what the typical work day and week is like, and I ask if working more than 40 hours a week is common. I'd say like 25% of the companies do say it's common, and those are companies I quickly cut ties with because it just tells me immediately they are poorly ran from the top down.