I get what you're saying. I specifically said "modern capitalism" though, not "human history". I would say that the rise of modern capitalism is precisely the rise of the class of people who have to sell their labor to survive.
But I get your point that initially there were still people -- in the USA -- surviving by owning their own farm not selling their labor, and that this number has continued to decrease. But yes, I think that's precisely the nature of modern capitalism, to decrease this number. (and the number was initially much higher in the USA than, say, Europe, largely because non-elite immigrant settlers were able to avail themselves of "available" land, something not available to the otherwise "working classes" in Europe...)
In any event, it would be suprising if today most of these non-working men were supporting themselves by subsistence farming and foraging/hunting, indeed.
> During the great depression roughly a quarter of Americans worked on farms, a century prior to that virtually all Americans did
We need to be careful about being slippery with these categories though. Some of those people who "worked on farms" historically were, in fact, selling their labor -- and from GP, "working for starvation wages that don't allow them to build savings" in pretty dire conditions. And prior to 1865, many of the people in the USA who "worked on farms" were enslaved in forced labor, which is not in fact "selling your labor", but it's of course worse in all respects.