alt Hacker NewsThere are a few cases of ads that might not be practical to remove, though most of that would be more like sponsors and ad content that is a part of the show. You can certainly get live sports without ads, though you will of course still have the pauses in the game that allow the ads in the first place. But it's not unusual to see e.g. the halftime in soccer filled with analysis on public television that doesn't allow ads in that circumstance.
And ads for their own services are still ads.
In most of these cases, you will see a place like D+ carry the same announcers as the TV station. Here Inbet it would be ESPN crews. So having a different, special crew just for ad breaks would not be exactly great. And given the density of ads in, say, the Super Bowl, you would be hard pressed making this a good experience.