No you don't? Good in camera JPEGs will utilise push-pull processing, exposing for maximal dynamic range all for you. You don't lose the advantages of the better optics and sensor just because the JPEG is produced in camera.
Furthermore, JPEG supports ~8 stops of dynamic range while my X-Pro3's raw files support ~14 stops. You lose almost half your total DR when you shoot JPEG (with that camera).
>You lose almost half your total DR when you shoot JPEG
No because the camera is applying a tone curve that compresses that DR when producing the JPEG. You lose precision, not DR, but if you don't intend to process the image further it doesn't matter much.