AMD blows minds with a 16-core 7nm gaming CPU that works like any other Ryzen

It's largely the lack of anything specific that marks it as a gaming part. The Ryzen chips are AM4 socket and have 24 PCIe lanes and dual channel RAM.

It's slightly smooshing the line between Consumer/Desktop parts and High-End Desktop (HEDT) parts, but AMD's HEDT/Workstation CPUs are Threadripper on the TR4 socket and have 64 PCIe lanes and quad channel RAM, and its Workstation/Server are Epyc on the SP3 socket with 128 PCIe lanes and 8 channel RAM.

(There may also be more specific stuff WRT how it handles threads and memory. Threadripper has a specific gaming mode that basically shuts off half the chip to simplify threading and optimize memory access for software, at the expense of having less resources available overall. Not seen a hands-on with the Ryzen 3000 chips that covers NUMA/UMA etc, but as it's only dual channel I don't think it'll be required. YMMV, IANAL.)

The gaming part comes from single thread / low thread count performance. For instance, in many games, having a lower ST perf means losing frames by "bottlebecking" the system.