To be fair, that can be necessary to make the action understandable, especially when you're adapting a game that you don't expect the viewers to be experts in. (Which is always because these shows are usually supposed to be advertisements.

Imagine an MtG-themed show where battles looked like this:

Player A: "Okay, your turn."

Player B: "Untap, draw... In my precombat main I play Isochron Scepter with Pongify."

Player A: "Fold."

Spectator: "Yeah, that was obviously unwinnable."

...without even bothering to explain the cards, much less why player A's game couldn't stand up to a questionable use of an Isochron Scepter.

(Of course a particularly egregious case was Yu-Gi-Oh, which needed these explanations because the card game as shown on the show made no sense.)