People love cutting lands because it psychologically makes them feel like theyll flood less (statistically true, but by a minor amount)
Depending on whether these two cards were Shiny Pokmon-GX or other cards, the Shiny Pokmon-GX would make up 70-72% of the cards on the sheet, and should make up approximately that amount of the pulls (though previous experience writing this guide indicates uncertainty tends to be high in this regard)
Because its not just about getting cards
Best case, the product is under-printed, the cards are undervalued, and your purchase looks prescient
You might be tempted to swap out Kotis for Muldrotha, and there is merit in doing so, but you can always bring Muldrotha back turn after turn with Kotis, and eventually, Kotis will outscale Muldrotha in terms of power once you cast two creatures from your graveyard, and will only keep growing