[Shorel]

My only question is how this is even surprising.

Wi-Fi is an arms race between you and your neighbours about who has the most powerful Wi-Fi transmitter, while Ethernet works wonderfully and collision free, in terms of network packets.

We all have at least three Wi-Fi devices, including the smartphone, using some frequency bandwidth.

Yes, people dislike cables, but if you ever play and transmit the game via OBS to Twitch, for example, Wi-Fi is simply not going to cut it any more.

[WithinReason]

In principle Wi-Fi devices should be able to find a free frequency channel to communicate in (especially Wi-Fi 6 that parent refers to), so yes, this is surprising. Maybe there is a reason GeForce Now has a page about recommended Wi-Fi routers:

https://www.nvidia.com/en-gb/geforce-now/recommended/

[Shorel]

These huge, powerful routers are exactly what you don't want your neighbours to have in an apartment building. =)

[WithinReason]

Wi-Fi power is limited by country, so a cheap router will have the same power as an expensive one. The expensive ones can direct it better, so I think you want your neighbor to have one so the power is used for their devices and not yours.