Adding 1 additional playable and running 17 lands slightly increases your odds of drawing a playable over running 17/40, and that playable could be the difference between making a great play or making a suboptimal one due to the wrong ratio of lands/non-lands in your hand
Considering the probability of being caught first, the probability that the hand is good, the probability that the release will not be gamma if it is not good, the probability that the opponent's extra deck itself does not exist, the probability that the opponent will not consume the extra deck if the second attack starts, and the probability that the permission does not exist, the win rate is not high at all compared to a regular deck, so there are very few people who use this deck directly, and even if they do, they try it out of curiosity or just to give shit to the opponent, regardless of the win rate
Second, you can try to focus on the light "lands matter" subtheme and play with Ramunap Excavator, The Gitrog Monster, Life from the Loam, and other cards based on getting lands in and out of your graveyard
Show me the human spiders baby