A robot doesn't have a preference. It wouldn't "rather" do anything because it's not sentient. Machines don't need rest because they aren't capable of regenera

A robot doesn't have a preference. It wouldn't "rather" do anything because it's not sentient. Machines don't need rest because they aren't capable of regeneration. They run and damage accumulates until they break. Then they're done. You can run them less and have the damage accumulate slower so they last longer, but they don't heal themselves without somebody else to perform maintenance. Living things on the other hand, do repair themselves while they rest. In fact, they even grow stronger to better endure the stresses they experience. So, that's the point of rest.