I wish lawmakers had some balls on this subject. If there's gambling, they should have to register as a gambling company and comply with all the other restrictions on gambling advertisements in each jurisdiction.
The problem here is that Baltaro does not have gambling. It just uses cards and chips as the basis for playing the game. Like Magic the Gathering or Inscryption.
There used to be ante in MTG. You'd play for cards in each other's decks and were to keep them if you won the game. Plus, there were a number of cards actively interacted with the ante'd cards and added or changed what's in the ante
They also base it on poker, yeah cards can transform each other but it's still quite literally a poker game. This isn't MTG. (Which is just real life loot boxes)
But poker is only a gambling game because when you play it you "give up" something of value in the hope of winning more through playing and randomness. What makes it gambling is not the cards or the chips it's the gambling aspect. Balatro uses card and poker hands, and so does "yatzhee", but it does not use any gambling mechanic. Lootboxes on the other hand use gambling mechanic.
Although you may be right about why they did it, I feel like imagery of gambling is not meant to be 'something that is in any way related to something that happens to be gambling', it's when gambling is shown but you're not the one gambling. If someone in game is gambling that's imagery, if a game uses cards for something that is not gambling it's not imagery.