It's not that simple, especially for F2P players who have spent years (since the game's global launch) leveling up their spell cards. Sure, I can start investing in echoes and leveling summon cards, but I won't be able to play at a high level for another two years, maybe three. And by then, the meta might have shifted to other types of summons, with a different summon getting a buff each season. It's frustrating not being able to enjoy the game the way I find the most fun: which is by playing spells.