Standard log conversion lookup tables are destructive and not reliable for high quality post.
Typically, 3DLUTs can cause texture deterioration, noise enhancement, tonal deviations, clipping, loss of density, loss of detail, harsh falloffs, many inconsistencies and other complex issues which cannot be undone later in the image pipeline.
Primers are designed to be used as neutral colour correction base image shaping tools, providing high quality results in post.