Can the average US tech worker take 3+ week long holidays every year (which are great for disconnecting), like clockwork? I highly doubt that, I've seen it in several American companies, where most of my US colleagues would basically only get what I'd call "bird droppings": 1-2-3-5 days here and there.

Even though on paper the average tech worker might have 20+ days off, if the culture is not there, peer pressure will kind of force you to compromise in other ways.