Does a laptop really need more than 1Gbps or whatever you can get through WiFi? It's an edge device not a router.
For the niche enthusiast, that dongle is fine.
Same for my SFF PC which only came with 2.5g onboard and no extra slots because ITX and can now do 10g via the same USB adapter which is great.
I agree, but laptops are severely power and storage limited. How many >100GB games or whatever can you really download and actually play on a typical laptop? If faster Ethernet increases power consumption, it's probably a negative overall.
And yes, some of those links are above 1gbps so that the users can have individual 1gbps links.