Counterpoint: Most start-ups are going to have crunch times periodically where extra effort is called for. At least if they are trying to solve an ambitious problem. I doubt she is talking about a 24/7/365 death-march.
Every company is going to have crunch times periodically, but that isn't touted as "standard" like with startups. She's saying that if you care about work-life balance you're not the person they are looking for, which is complete bullshit.