Lightroom,... It has no pixel editing abilities.
Not strictly true. Lens correction, perspective distortion correction and image rotation all change individual pixel locations and redraw them. Heal, clone and local adjustments - brush, grad filter and radial filter - all operate on the pixel level. Even sharpening with the mask set to anything above 0 treats pixels differentially. As a matter of fact, because the Basic tonal sliders work on a curve and are operative within certain tonal ranges, not globally, they treat some pixels differently than others. Same for the parametric and point curve editors. HSL and Vibrance sort pixels on the basis of chromacity. Oh yeh, add vignetting and grain simulation to the list.
I also use the term "pixel editors" as a convenient reference to destructive RGB editors, but really, the description of Raw "converters" (also a poor name) as processing images while other editors process pixels is increasingly inadequate as converters compete by acquiring more tools and probably misleading for the newby who seeks more than a superficial knowledge of how the software works.
O.K. That was today's rant. Another one tomorrow.