You spend 40 hours a week just at work, not to mention commute and lunch. If you're getting a full night's sleep that means you spend more time with the people you work with than you do probably anyone else in the world. I agree you should aim for a healthy work-life balance and date outside the workplace but it's a bit naive to think that people won't build relationships with people they see that often.

What people at that level in any large corporate hierarchy have a healthy work-life balance? I would expect the answer to be near zero.

Perhaps we have identified the root problem.

What do you consider a healthy work-life balance? 8 hours a day? 6 hours?

If we assume you sleep 8 hours then you spend 16 hours awake, 7 days a week for a total of 112 hours in a week.

Even if you only work 6 hours on the weekdays that'd still 30 hours a week, or more than 1/4 of your waking hours.

If you work at a big company you probably run into a lot of people and you already have a shared interest and stuff to talk about. There will always be a decent chance you'll meet someone you're interested in at work.

Unless you think that everyone should restrict themselves to only dating people who they meet for the explicit purpose of dating there will be relationships at work. Often relationships form without people actively seeking them out.