You can even make the argument that it’s a mitzvah to talk during kabbalas Shabbos to show that it is not part of davening, which is why most Nusach Ashkenaz shuls have the chazzan by the bimah and not the amud.
And it is assur to talk in a shul, but not in a beis medrash and most shuls today are classified as batei midrashim.