Why do most hand disinfectants claim a “virucidal activity against enveloped viruses”?

This is because most clinically relevant pathogens can be inactivated with a hand disinfectant providing virucidal activity against enveloped viruses.

Background:
Hand disinfectants that guarantee full virucidal activity often include a higher proportion of the active ingredient or come with the addition of phosphoric acid. However, both solutions can negatively affect the skin. Thus, to ensure better skin tolerance and health compliance, hand disinfectants should be selected according to the respective pathogen risk. For routine disinfection, a product with a virucidal activity against enveloped viruses or limited spectrum virucidal activity can be used. For adenoviruses, rotaviruses or noroviruses, a hand disinfectant with a limited spectrum virucidal activity or virucidal activity can be selected. Finally, all non-enveloped viruses require products that provide virucidal activity.