Without modern entertainment devices, or even books, what else are they going to do? Some “work” could have a lot of crossover into hobby. Some people enjoy cooking, making tools, spending time with kids, etc. They need to do something to pass the time. The stuff is also for a clear purpose. Making a tool to solve a problem right in front of you feels different than performing a seemingly arbitrary task everyday because a boss says so.
The Bush People previously called The Pygmies are modern humans who eat the diet of the previous homonids and get stunted by the caloric deficits. The only thing they plant is hemp, which doesnt scale to actual agriculture.
It looks like they work only a little if you count only pure hunting attempts, the most food rich seasons and ignore the rest.