The single tube digital imager is also very light and looks fragile, and part of it is probably the actually device itself is not too heavy. However I also wouldn't be surprised if they were not designed or intended to have the same robustness as more proper NOD mounts elsewhere.
Overall the PLA just places relatively low value on infantry force multiplier capabilities or equipment. They're equipping infantry a little bit better than a few decades ago, but they probably continue to experience relatively low/finite funding and they are putting it into higher yield capabilities even if one thinks about the ground warfare domain only (e.g.: tube and rocket artillery, networking, recce assets). To be honest I can't really fault them on that.
I would certainly agree that the PLA mounts are designed for less weight and ruggedness as traditional western mounts.
However, I think it would be a bold and highly illogical claim that the PLA mounts are fragile/inadequate due to penny pinching.
For starters, the PLA are infamous for having extremely high reliability and durability standards for their infantry gear. So it would be extremely out of character for them to significantly deviate from that when it comes to NODs mounts.
Secondly, the PLA’a digital monos are actually not that cheap. The civilian version’s prices are on par with gen2 IITs. And when you see how much even very high quality knock-offs of western style mounts sell for on Aliexpress, it’s hard to see how much they would actually be able to save compared to using western designs built in China, since the lion share of the price of genuine article western mounts are profits, the mounts themselves are just machined allow and doesn’t cost that much to make.
Any tiny cost savings would absolutely not be remotely justifiable if it made it more likely for the digital NODs to be damaged or lost in the field. I would not be surprised at all if the PLA’s mounts actually costs more to make than western models since its design would require tighter manufacturing tolerances and potentially more expensive base materials (titanium perhaps?) to achieve high reliability and durability requirements.
Lastly, I think we need to make a clear distinction between appearance and reality. Western style mounts like the popular Wilcox actually have deliberate weak points built into the design as part of their break-away safety feature. So if you get your NODs caught by something with high force, the mount will break before your neck.
This last point is potentially a major reason for the big difference, as I feel western mounts are basically massively over-bulked for primarily psychological purposes. All that solid metal feels reassuringly solid in the hand, but with break-away features, just how necessary is a lot of that bulk and strength?