I tend to differ from ExDilbert. I smart wired my parents home well over 15 years ago when an ethernet outlet behind your tv was unheard of. Fast Forward to 2018/2019, most providers like Bell Fibe and Rogers Ignite can and will utilize the ethernet plug for tv connection, they also work over wifi too, and several media ip boxes support ethernet and or wifi, as well as my blue ray player it uses both connections as well. So even though your satellite tv receiver may not need it, its optional, what if you get rid of satellite down the road and go with iptv? yeah you might very well do that and utilize the ethernet connection.
Now yes wifi is great but wifi also can and will have issues, no matter how great the advancements are, its still a radio signal and subject to any interference radio signals have to deal with. im an IT expert, hard wired is always the best and safest. if you can run a wire, go for it, but im not nocking wifi, go ahead and use it if u want