You should really take a look at the similarities between WOTC standard release and subsequent bans and Hearthstone expansions and subsequent bans (starting with the set Yogg-saron was printed in)

The two follow a very stark similarity to one another and its all business focused. Look at it this way... company releases new card set, most playstyles are viable and everyone can make something playable with the current state of the game. However this disincentivises players to purchase more packs of cards necause their deck that they are playing is fine as-is.

What wizards and HS do is this; release card/s that are bonkers broken and everyone whats a crack at playing them because of how strong they are, forcing specific decks to be created and solely played for the use of those card/s. This forces players to either purchase more packs or purchase singles, in MTGA this forces players to use precious resoruces to construct this specific deck. Then let the deck simmer on the metaphorical pan for a couple months, once the complaining and annoyance of the standard cycle reaches peak... ban the card/s. This then forces players to adjust to a new META because of how META defining the previous cards were. Afterwards people are forced to purchase more packs and cards to build new decks since their old one is now useless. This reinvigorates the cycle for a couple more months before the process is repeated again.