Agreed, it’s definitely context dependent. There’s a world of difference between holding up a line in a store and having a conversation, however limited, with a taxi driver.
The shop could be completely empty, no queue, and the shopkeeper might be free and even bored, but chances are he still won't want to listen to a novice-intermediate foreigner practicing Dutch. Listening to halting speech can feel like a waste of your time even if you have nothing better to do.
