That is like saying people should not be driving cars since there is someone dying of a car accident every day. And that a person is to blame if they took their family out for a joy ride, and ends up in an accident killing them all.
That is also like expecting someone never to ride in a car, because someone dear to them were killed in an accident...
Some 25 years ago, I learned from a homeless man on the streets of Vancouver a curious hypothesis: AIDS probably originates from those damn condoms themselves! The molecules of the latex rubber mutated into the virus, you see ...
The rabies vaccine is part of rabies treatment, but it's used in the window between being exposed to rabies and developing rabies. People who've been exposed but haven't been previously vaccinated also get Rabies Immune Globulin, which provides immediate antibodies until the body can respond to the vaccine by actively producing antibodies of its own.
CDC: "Rabies vaccine is given to people at high risk of rabies to protect them if they are exposed. It can also prevent the disease if it is given to a person after they have been exposed."[1]
[1] https://www.cdc.gov/vaccines/hcp/vis/vis-statements/rabies.h...
https://www.mayoclinic.org/diseases-conditions/rabies/diagno...
Maybe the vaccine can still stimulate you or immune system faster than the virus can take hold?
If the threat of diseases we've eliminated returning isn't enough, then perhaps only the diseases themselves will do it.