Encephalitis is much more rare, but it's much worse than lyme. And there's a stab for it. Meanwhile Lyme is much more common, but much simplier to treat. Which is basically „take antibiotics or 3 to 21 days“ depending on how long it's been since the bite.
Humans generally aren't vaccinated for Rabies either, unless you are e.g. a veterinarian who might have a higher chance of exposure to it.