I guess because you have a life or interests outside of work. I'm pretty sure that my impression is correct and that anyone working there is not leaving at 5 to

I guess because you have a life or interests outside of work. I'm pretty sure that my impression is correct and that anyone working there is not leaving at 5 to pick up their kids or going kayaking road trips at weekends with their friends. They are dedicated, smart engineers with little interest or time outside work. That's fine for them, but it doesn't work for me. I'm probably not smart enough anyway, but I'm damn sure I'm not committed enough.