I don't quite understand what you are saying, but I guess that is why my two RF lenses only weigh 3.15 and 2.63 pounds each. Thank God for mirrorless computing power and lightweight lenses. Seriously, what is inherent to mirrorless that makes them more powerful in computing power than a DSLR. I would have to argue nothing at all. The EF lenses I used to have were mostly from the DSLR era, not film. Every single film era lens I own (more than 40) are very light and small. Even my Mamiya/Sekor 400 mm f/6.3 preset (4 elements) weighs in at just 935gr/33oz.To correct geometric distortion and vignetting in zoom lenses, more optical elements are used and result in expensive and heavy lenses. Since mirrosless has high computing power, you can make lens with uncorrected distortion and vignetting, and leave the job to the camera software. Such a thing could not be done with EF lenses, which need to be compatible with photographic film camera (mirrorless does not need). Canon first makes use of a tactic that Sony has been using for a long time.