BOF: SDET yet another rattle title or separate engineering line RU

SDET stands for Software Development Engineer in Test or Software Design Engineer in Test, this kind of role is originated from Microsoft and currently many organizations are demanding such SDET professionals who can participate in development of the application and also in testing of the software developed. But do companies get this title right Or just sell same people to the clients with a new price tag above new title Is it a new engineering line to advocate clients and product quality or just a rattle