Be assured that “early” man was fully capable of doing all this, and perhaps more that we don’t know about (since all actions don’t leave archaeological remains).
Don’t forget that “early” man was in reality fully modern in terms of mental and cultural capabilities. What they were mainly lacking was more advanced technologies, such as metal working, electronics, etc. that we think are indispensable for life; but in reality these technologies are not required for advanced cultures or ways of life.
They had all that you mentioned (ropes, corrals, etc.) and more; and in a lot of cases, flint/stone tools are superior to “modern” tools (i.e. metal/steel) for some tasks, such as dressing out kills (look up archaeological studies that tested out using such tools for tasks such as potential for killing, penetration, dressing carcasses, etc.). Stone tools are actually sharper than steel tools, keep their edges longer, and are easier to re-sharpen. (They are just lacking the tensile strength of steel.)
Don’t sell early man and their technologies short. We (modern men) tend to look disdainfully down on earlier cultures for no reason other than they were before us. Culture doesn’t necessarily “evolve” in one direction.
Fascinating topic - now reading Dorling Kindersley ‘History of the World’. Still trying to pin down the time line of the woolly mammoth vs. the homo sapiens population by area/land mass.
Clearly, early man had highly developed survival skills; learned and innate...which still exist in wild animals (squirrels are my favorite Einsteins) and observed in feral dogs.
Agree with you that ‘modern’ man has lost the many ‘natural’ instincts of our ancestors; especially the ability to improvise in crises or necessity. As an old woman, I can fix anything with a hammer, but have no idea how to text on an IPhone;)
Devolution - we are going backward like zombies.