The point of insurance is to safeguard you when things go really, really, really wrong.
Most of us get it. Your house and possessions probably won't get incinerated by a sudden fire but if it happens, you'll be glad you paid a premium for the benefit of an insurance payout. Without it, you're kinda screwed.
For better or worse, Pedro is Barcelona's insurance policy right now. That's why it's not hard to understand why club president Jose Maria Bartomeu talks him up at every turn, referring to him as part of "the club's history" and saying he believes he'll still be around at the Camp Nou after deadline day.