Because the popular raw development engines (including those built into the cameras that do the conversion to JPEG) aren't attempting colorimetric renditions. They're going for "pleasing" color, with everybody tuning their algorithms for their own special sauce.
What, you thought all those different picture styles were random flailings at trying for colorimetric accuracy?
They are different optimizations with different parameters. You would think that each company would offer at least one "colormetric accurate" profile, right?j
Worng. Very, very worng.
Nobody wants colorimetric accuracy save for those doing fine art reproduction, and those of us doing that kind of work don't need any hand-holding from the manufacturers.
Actually, they are trying.
ORLY? They are?
Show me just one canned picture style / whatever from just one manufacturer that doesn't have an S-curve applied after gamma adjustments.
Dude, they're not even pretending to try. Because that's not what their customers want.
Since you cannot have color accuracy, going for pleasant colors is the right thing to do.
No. You can have color accuracy, if you know what you're doing. I do that all the time. As I've already written, the artists whose work I reproduce have to look carefully and study the print in a side-by-side comparison to be able to spot the differences.
Going for "pleasing" colors is the right thing to do for the major manufacturers because that's what their customers are demanding.
Sure. Go to IR, download their RAWs and try to match the colors of different cameras.
Why on Earth would I waste my time on such a fool's errand?
That's not how colorimetric work is done. That you think that that's how it's done more than amply demonstrates that you have no clue about what you're talking about.
Have any camera you like delivered to my studio along with any samples you like of artwork that doesn't contain fluorescent / iridescent / metallic / etc.
pigments and, for my standard fees, I'll return the camera and artwork along with a print that's a very close colorimetric match within the limits of the iPF8100's (rather large) gamut. If the prints will be evaluated in non-standard viewing conditions, I'll need a proper spectrophotometric reading of those conditions, such as what can be obtained with an i1 Pro in ambient measurement mode. The measurement must be in GCATS format and the instrument must be in the same position as the print will be viewed in.