Kmgw9v wrote:
I shoot RAW, and import the RAW files into Lightroom; and then begin deleting, and making adjustments.
I personally see no reason to shoot RAW and JPEG--but I could be missing something.
No one has addressed your very valid question yet.
The primary uses for raw plus JPEG are:
Immediate JPEG transfer from camera, via WiFi to smartphone, then smartphone to end user's email or server. The raw file can be edited later, for quality. (Photojournalism)
A professional job with a low budget, tight deadline, poorly controlled lighting conditions. Some images will be fine for immediate use. ALL will have backup latitude in raw files.
You are a pro and you FULLY understand ALL the menu settings on your camera, and how to set them for specific lighting conditions. The aim is to bypass post-processing for certain types of subject matter that do not need it. But you may see future uses of the same images that may be more lucrative... So you keep the raw files.
Recording raw files can help you bypass minor exposure and white balance errors. It allows maximum flexibility and quality in post-production, assuming there is time and budget for post-production.
Recording JPEGs can provide excellent results for certain subject matter, without the time or cost of post-production. Some wire services REQUIRE JPEGs. Most forensic photography must be done as JPEG only. In both cases, this is to ensure no one tampers with the original photos. In the case of photojournalism, it MAY be okay to capture both raw and JPEG, so long as the editor sees both for comparison.
The bulk of school portraiture and big box studio portraiture is recorded as JPEGs. There isn't enough margin in that extremely high volume, low price business to post-process raw files. Some of the labs churn out nearly a million packages of portraits a week! So those companies have very stringent standards for exposure and white balance, and the procedures to uphold them.
A little known fact about the JPEG file format is that it was never intended as a file format for editing. Way back in the 1990s, it was intended (and used) as an efficient format for image distribution, network transmission, archiving, and printing. The original assumption was that images would be converted from raw to TIFF or PSD, with adjustments in both places. Once all adjustments are complete, a JPEG is saved for viewing, web pages, photo labs... In-camera JPEGs were intended to be cull edit tools.
HOWEVER, as cameras evolved, they got better and better at processing JPEGs, with more and more sophisticated tools in each generation of camera. In many cases, if you know what to do with the menu settings, exposure, and white balance, you can create very nice JPEGs at the camera.
Somehow, that fact got lost...