I mean what the literal hell is the point of it if you can barely see the cards the players are using much less get the plays they are making?

When it's a virtual card game like Hearthstone or YGOpro it makes more sense since it's designed to be far more visual, but live streaming a live card game where people are playing so fast it just looks like they're throwing barely visible cards around, and nobody is even commenting on the plays is so pointless in my opinion, especially since card games aren't exactly visual spectacles like sports or video games.

One of the cool parts about live streams is that it lets people curious about a game see what it's like, but in card fames you don't get that, in fact you get the exact oposite

In any FPS or fighting game you can come in, take a brief glance and immediately get a general idea of what's going on, nomater what weapons or character or whatever they may be using. The same applies to Strategy,  RTS games and MOBA's although to a bit lesser extent (at least in my experience) . You can tell when people are fighting or building, sometimes the character's attacks have outlines, and possibly health bars.

Meanwhile in a card game, you come in and see what? Small card art and if you're lucky and squint hard enough maybe the card's name. And in these tournaments nobody slows down to explain things (sadly this is usually because the metagames are so stale all the top players are using the same few decks anyway)
 This means unless you have prior knowledge of the exact cards and decks and their mechanics you will be completely lost. The game is going to be unrelatable and there wont be much engagement or interest outside of the most dedicated fans of the game. You're not going to pick up any newcomers like that, not even old players with a potential rekindled interest are going to be picked up, since card games these days always have these new borderline-game breaking mechanics that are going to look completely alien and intimidating to those players. I bet people are more likely to get turned off from a potential interest in a card game off of exposure by live-stream since it's so non-engaging.