That’d a bery good caveat, but we still know that these socities had a lot of “free” time.
Except I'm discussing literal survival. Protection from the elements and cold, gathering potable water, gathering and working materials for cooking and tools that are essential to processing catches to safely edible forms, etc etc etc. Coastal hunter-gatherer societies in particular are not standing in the surf collecting fish which just wash up on the shore; generally, it involves going out on the coastal waters in a boat - something which requires production, maintenance, tools for propulsion (like oars), and tools for fishing (like bone harpoons and nets). On top of that, most hunter-gatherer societies are not sedentary, which adds substantial travel time to the average workday per year.
The concept of hunter-gatherer societies having a lot of 'free' time springs from misconceptions like the above, confusing work for food with necessary work, in general. Hunter-gatherer societies have more free time than early sedentary subsistence farmers, but the difference is more 14 hour day vs. 10 hour day, not 14 hour day vs. 4 hour day.