They need somewhere to reflect or get some privacy
While people have become habituated to taking their rest time in noisy, busy places, our biology still benefits from regularly being allowed to slow down and rest, just briefly, so that fresh energy can be released. The natural rest/activity cycle is about 90 minutes long, though it varies from person to person and depends on what is happening at the time. It is possible to override the natural break times, but the end result is increasing fatigue and inaccuracy, and in the long term a less healthy and engaged workforce.