That and ig skits and YouTube skits work because your used to that format.
If you know anything about cinematography, film, tv....the way it's shot, the angles.....You'd be pissed watching these cats on NBC. We laugh cause they're short and it's usually to the point. What hurts them on actual tv, is what helps them on youtube/ig. Those weird angles, fukked up cuts, even mismatch audio levels. One person is louder than the other even though they're talking to each other, someone yells and the audio distorts.
There's a huge difference between tv and ig. You don't hear people's footsteps, you don't hear the glass or cup clink when they put it down, shyt you really don't hear doors open or shut even when characters enter and exit even though you see it, unless it's intended. You don't hear couches make noise when people sit down. For the most part a lot of ig/youtube sketches don't have a lot of that either.
But you've seen tubi movies and cheap ass syfy movies...the sitcoms would just be terrible.
Go to YouTube and search for tv shows without laugh tracks and see how awkward they are. A lot of the skits are just filmed cause they know you can just rewind or play it again.