Thorny_locust and others have already said much what I was going to, but I’ll reply anyway.
None of our ancestors lived without tech. They had efficient weapons, tools, containers, cordage, dwellings, and they had societies. They too would’ve been fucked, if left naked and alone, just not as quickly as us. Most importantly, they had pertinent skills and knowledge that the Alone and N&A guys, and even the Bears and Les’ of TV Land don’t have.
The Devil is in the details. I have hunted, gathered and fished most of my life, much of it with primitive tech: handmade wooden bows and arrows, fire-hardened digging sticks, willow-shoot fish traps etc. The difference between wandering across the forest, hungry, and getting a meal is knowing when and where exactly to be for any given resource. This is very location-specific. You can only get a lukewarm, entry-level competence for locations outside the one you spend the majority of your (outdoors) time.
Many of the game animals I hunt have minute-like schedules: If I hide myself along a local game trail so that I am ready at 7:45 PM in mid-October, I’m almost guaranteed a close-range shot, at precisely 7:45 PM or a couple of minutes off. If I’m there at 8:45, I won’t see anything worth a shot.
Now at mid-summer, the local bream feed at 8 to 11 PM. If I’m not at the bream section of the the local river then, with appropriately bated hook, I won’t get fish, even if they are there.
These kinds of scenarios are repeated with most resources, even plants to a lesser extent. It typically takes me around 2 years of active field experience to really start reaping the benefits in a new location, with low-tech equipment.
If those TV guys had spent a couple of years on-location, learning the land, they would succeed way better than they do. In fact, that would be an interesting twist in the genre.
Our ancestors had lived in their local environs their entire lives, learning it as their schooling and profession. Not only that, they had an accumulated knowledge base going back untold generations to draw upon. In comparison, TV experts are like small children, when it comes to their know-how in some random, remote region they’re dropped into. They fare just as well.