Sex
The basic idea is that it should be as easy as possible to find a partner to help one achieve orgasm.
Masturbation requires a division of attention that undercuts the whole experience.
If that means a gloved handjob given by someone you don’t find remotely attractive (for example, same sex for a person who’s vehemently not gay), so be it.
A major push in the charge for assisted orgasms is significantly reducing the threat of violence & hopefully creating an environment where more people feel comfortable engaging.