Fully agreed to that. Li-Ning has excellent rackets with excellent quality. So far, I have seen zero sinking grommet issues on any Li-Ning racket whereas Yonex and especially Victor rackets were (and are) suffering for years. Also, as
@Swaraj Lakshman says, the paint job quality on their high-end rackets is incredible - I have had numerous minor contacts with other rackets with my Li-Nings and most of them didn't even cause a paint chip. With Yonex, it's sufficient to look at the racket agrily to cause a paint chip.
If you believe Li-Ning marketing, they are using military grade carbon which surely is at least at the same quality level as Yonex and other major brands. Li-Ning just massily sucks in terms of marketing. Or maybe let's put it the other way round - Yonex expecially is a genius in selling teenytiny innovations as the biggest thing since the invention of carbon fibre.
Regarding the initial question - having "softer" rackets is somehow part of their racket DNA. And not sure if you've ever played a Li-Ning racket, but they manage to still maintain great control and a superbly direct feel on impact without any unpleasant vibrations (like some Victor rackets have). And in terms of playability, the slightly more flexible shafts end up supporting the player to generate power, simple as that. "the stiffer the better" is not always true.