Either that, or if attached to a pole/bike rack with a chain or bar lock, they’ll just pull out the old angle grinder and go to work.
Happens everywhere, happens in broad daylight, happens when there’s people around, and usually doesn’t raise a lot of suspicion because “might be someone who’s lost their keys”.
Since there’s 4 bicycles for every person living in the Netherlands, the key strategy is just making sure your bicycle is a little less fancy than the one locked up next to yours. Thieves tend to go for the ones they can resell for the most amount of money. In other words: Hide in the numbers.