If the people who spend ten minutes typing out why they can't run Ethernet cables spent that same ten minutes actually figuring it out, this would be moot.
Drilling a quarter inch hole and patching it would be absolutely invisible, I've done it. You can also pop off the base board trim, drill a hole behind it and notch out the back of the trim for an inch or two. You can also pull up the edges of carpet along the wall, and stuff the cord under the carpet and tuck the carpet back down.
Run the cable along the base board or even along the ceiling with electrical tape and spot test to make sure the tape won't strip paint. Or just run cable loose on the floor only when you're playing sets online. You can get those cord covers made of rubber to plop over the cable to mitigate tripping or deter animals for getting after the cable
I just can't believe the avalanche of excuses that people unleash for something as simple as runnng a cable.
There may be a few people here and there that have such true undeniable barrier from going wired, but that's just not the case for many people.
But hey, play on wifi, I don't really care. For the most part my games online are very good even with wifi opponents. I agree with the statement that first and foremost, the quality of the internet connection independent of wired or wifi is the most important factor in a good playable match. But going wired is a controllable variable that clearly helps to ensure that a good internet connection will more consistently perform that way.