How/why is herpes simplex 2 considered worse than herpes simplex 1?

It isn't. These viruses are very similar except that type i usually infects around the mouth and type ii around the genitalia.

Related Questions

Please advise what is the difference between herpes simplex 1, herpes simplex 2 and gential herpes?

Different Viruses. Hsv 1 and 2 are 2 viruses in the same family. They cause oral 'cold sores' and genital herpes. Both viruses can cause genital herpes. Read more...

Can I get herpes simplex 2 on my vagina from having oral sex that has herpes simplex 1 on their mouth?

No, but, Herpes simplex 1 & herpes simplex 2 are distinct viruses. You cannot get hsv2 from someone who only has hsv1, but you can get hsv1 in the genital area or hsv2 around the mouth. It is possible to have hsv 1 & 2 both in either the oral area or the gential area. Read more...