Someone please tell me...What advantage does Lisk serve in relation to current centralized application environments?

If my app on my server at my datacenter gets ddos'ed my app/server is unavailable. If my app on a Lisk delegate gets ddos'ed...MY APP IS UNAVAILABLE.

Am I mistaken in thinking that I would need to then use another node and update my redirect to the new node so my dapp is available again? Because, if that is the case...The entire world already does that in a centralized environment when they have an issue.