Thats because each box includes 24 Jumpstart boosters, and every pack contains 20 cards, including all the lands you need to play
These are strategies that revolve around playing a bunch of creatures with the same type alongside cards that give you bonuses for that creature type

Draft Boosters 15 Magic: The Gathering cards per booster 1 card of rarity Rare or higher in every pack 3-4 Uncommon cards 9 Common cards 1 Land card (Full-Art Land in 33% of boosters) At least 1 special Borderless card of rarity Uncommon or higher 1 Traditional Foil card replaces a Common in 33% of boosters Set Boosters 12 Magic: The Gathering cards per booster 1-5 cards of rarity Rare or higher in every pack 1 Art Card 3-6 Common cards 1 Land card At least 1 special Borderless card of rarity Uncommon or higher 1 Traditional Foil card 1 token/ad card, Helper card, or card from The List Collector Boosters 15 Magic: The Gathering cards 5 cards of rarity Rare or higher in every pack 5 Uncommon cards 4 Common cards 1 Full-Art Land 10-12 Traditional Foil cards in every pack At least 3 special Borderless cards per booster 1 Traditional Foil double-sided token Commander Decks Two Decks 100-card ready-to-play Wilds of Eldraine Commander Deck

I don't love everything or even most things about the finance aspect of the game, but again, it's not like most of the forgeries going around are the $2,000 Reserved List cards that were bought out by speculators
What About Everything Magic Has Ever Printed
The rest of the deck are filled with powerful scry enablers or ring tempts you: we've got classics like Serum Visions but a lot of unique stuff like Celeborn the Wise, Cryptic Annelid, and Horses of the Bruinen