Good to see the incredibly crass hooligan comments have stopped. Not a fan of the sport, so we will use sweeping generalisations and stereotypes to describe its fans.
When it comes to TVs, and theming, at the pool bar at Riverside speaking to bar tender while watching a game for a bit and he was saying they wanted larger TVs installed (not specifically for the World Cup) but weren't allowed as it would ruin the theming.
They have added TVs to a quick service restaurant for a few days, which, are fairly unobtrusive. They could have had giant screens and a public viewing area outside at somewhere like Epcot or Downtown on the stage there, which would be far more obtrusive, generating crowds and noise.
There is of course massive demand to see the matches, especially from the huge numbers of international guests. ESPN plug their Watch ESPN app, but that isnt available to those from outside US. Large number of guests might not have phones capable of streaming matches on WiFi. It may be the case as well for people like us from the UK, we can watch matches live as well as video highlights on the BBC/ITV app, but only in the UK. I assume other countries broadcasters could have similar set up. Having TVs around property is a way they can see their team play (or, assuming your country hasnt qualified for all sorts of reasons, not least playing 4-6-0), your chosen other team.
As has been said it is only an event that happens for a few weeks every 4 years, being shown on Disney owned channels. They arent showing annual events or weekly fixyures from whatever sport - the various bars around property absorb that demand.
Yes, it should be a place away from outside world, but its a small obtrusion. Like not buying a paper, checking your twitter/facebook on your phone, or watching the news on your TV in the room, you can choose not to go to that location for food, you can go somewhere else. They have fully advertised the one sit down location which is showing matches, so those not interested can make other plans. We're hardly at a stage where every eatery has TVs.