If there is any loophole in a centralized system, there are huge benefits to exploiting it. So, there are strong incentives to attempt that, and a matter of tim

If there is any loophole in a centralized system, there are huge benefits to exploiting it. So, there are strong incentives to attempt that, and a matter of time before someone finds a loophole that's not easy to patch. Correspondingly, keeping up with attacks and patching loopholes is a necessary and intensive endeavor. In a decentralized system where the parts are diverse, there is no easy way to game every subsystem at once. Further, if the parts are loosely coupled, even if someone manages to game one of the subsystems, the damage is quite isolated, and other parts can carry on unaffected.