@grislybutter - me too since people claim to hear difference. I am open minded. However, I am also a former software engineer and have masters in math, singnal processing....
I can imagine that low end streamer may have weak CPU (like low power ARM) and small RAM, so it may be losing packets and not sending bits over USB in a timely fashion.
Another thing that network traffic includes other people in the household watching movies, browsing, playing games. Having network switch isolating this traffic from streamer may be beneficial, if streamer itself is a low performance device. After all, high performance would need fans and most people would not want that.