Why do people act like Seeker's Armguard is a terrible item?

People use this as an argument to argue a champion is broken.

It's literally + together as one item for way less.

The item gives both AP and Armor, stats that any AP Carry wants to both do more damage and take less damage from ADC's, AD mids and even top laners. It's 150% gold efficient and it builds into one of the best items in the game. Yes it delays your mana item but does exist and if you last hit with it and conserve your mana most mages will be fine.

It's like people are still stuck in their must build same items every game mentality, adapting is a cool way to play the game.