It's not about me disliking it, it's about an Admiral + Straw Hat Grand Fleet with healing buff + Unhurt Zoro being unable to even cut it. 
You yourself can't come up with an actual reason why it was made that strong, but everyone knows the reason why - to put a sense of urgency in the arc and to give the fighters (mainly Zoro
)something to do after finishing their jobs. 
In thriller bark, the timelimit was Sunrise. In Impel Down, the timelimit was Ace's Execution. In Fishman Island, the "timelimit" was Luffy bleeding out. In Punk Hazard, the gas was the timelimit and so on and so forth
Birdcage was a joke and to imply otherwise is even more of a joke

You yourself can't come up with an actual reason why it was made that strong, but everyone knows the reason why - to put a sense of urgency in the arc and to give the fighters (mainly Zoro


In thriller bark, the timelimit was Sunrise. In Impel Down, the timelimit was Ace's Execution. In Fishman Island, the "timelimit" was Luffy bleeding out. In Punk Hazard, the gas was the timelimit and so on and so forth
Birdcage was a joke and to imply otherwise is even more of a joke
