Well, to take the maritime allegory one step further: in a crisis at sea, the only resources you have are the ones you brought with you. No one’s bringing you additional options, no matter how much wishful thinking you do.
Now is when I point out there is an entire system in place for such an event as a president no longer being able to carry out their duties. There is a whole other person prepared to take over, not to mention that Biden has an entire government infrastructure that is not populated by insane people.