[IIsi50MHz]

Your belief is based on a misunderstanding. If you have not worked in a context where holding large amounts of details and their relationships in your head does not lead to "losing the picture" when interrupted, you have had a luxury not everyone gets to experience.

Getting "into the flow", or loading/reloading the details into your head typically takes 15 to 30 minutes for sufficiently intricate task or dataset. In such a context, a mere, "Hey, you got a minute?" is costly — more so, if i happens repeatedly during the day.

Treasure your freedom from such difficulties.