The "perakim" (chapters) of tanach were established by non-Jews. Why do we continue to use them? Many of the chapter breaks do not correspond to our petucha/setumah paragraph system, and they often seem arbitrary.

If the answer is simply they are helpful and we've had them for a long time, wouldn't it have made sense for Jews to set up a better system of chapters by now?

Why do we still use the non-Jewish way of delineating chapters in tanach?