I understand why rolling motion does no work. My (possibly imprecise) summary of the answer is that net work done is zero. And the role of friction is to convert translational kinetic energy into rotational kinetic energy.
(I am not interested in the specifics of that conversion - though it is both conceptually and mathematically intense).
Rather, the answers everywhere seem to indicate that NO energy is lost due to friction when rolling without slipping. But would not any conversion of energy (such as translational to rotational) involve some efficiency loss? (like a light bulb only converts x% to light and rest to heat)
Are these small enough to be neglected? Or does the concept of rolling without slipping imply that energy conversion is perfect (100%)?
Note: I understand that the concept of "rolling resistance" exists. I am talking about "ideal" rolling motion as discussed in introductory physics courses.