No, but technically neither did Estonians exist 6000 years ago. Just people (who may or may not have been speakers of Finno-Ugric languages, since the date of arrival of Finno-Ugric speakers in the area is uncertain) whose distant descendants would one day refer to themselves as Estonians. Which of course does not take away the fact that the Finno-Ugric population in present-day Estonia have lived in that area in an unbroken line for a remarkably long time (one of the longest continuous linguistic lines in Europe in fact). Especially remarkable if you consider the fact that most of the other Finno-Ugric populations in the area surrounding present-day Estonia have been assimilated into the Slavic populations that seized control of the area during the late classical and early middle ages. And I think we can indeed say that those bogs have played a big role in this survival.Frisians nor Germanics didn't even exist 6000 years ago and Indo-Europeans hadn't expanded into Europe from the steppes yet but I get your point.
On a sidenote, the best part of coming back to these forums after like 4 years or so has been seeing that good old es333 is still going strong with his Estonian threads and hasn't changed at all.