PADI Rescue Diver training will prepare you to prevent problems and, if necessary, manage dive emergencies. Knowing what problems can occur makes you a much more aware and capable diver, and gives you the knowledge to prevent problems from occurring.
Rescue diver qualification is highly regarded and is required if you wish to become a Master Scuba Diver (the highest level in recreational diving) or if you wish to go pro and take the Divemaster-Instructor path.
However, even if you are doing it just for yourself, Rescue Diver training gives you invaluable skills and knowledge. Even many very experienced divers will say it is the most rewarding course they’ve done!