Notwithstanding I'm skeptical of your claim, being "naturally social" is the entire reason language has evolved. A (very) distant ancestor's nature has no claim on your nature.
That ancestor probably has some tiny amount of bearing, though possibly negligible.
Language doesn’t prove the absence of natural solitude. It just shows we’ve been “pretty social” for a while.
For modern humans it does.
You can't dedicate a huge percentage of your brain to speech and communication in general, and allocate a sizeable percentage of your total energy usage (!) to them, and still be meant to be a solitary species.