If you find faces to be useless, you can hide them on your computer monitor while in a meeting and no one would know. In the metaverse the avatars will not be faceless and you won’t be able to hide them from view
In Facebook's metaverse you can't, but in VRChat (that is, the app people actually use), disabling others' avatars (which sets them to a generic default 'robot') is default functionality.