This is just not true. If you've ever worked remote and need to work through a problem there is nothing faster then getting on the phone and doing a screen share just as if you were face to face.
I think what's really going on is that people who grew up analog don't see textual decisionmaking as "real", and need a familiar voice call to make things feel "official".
For me, my team is mostly +15 or +8 hours from me. So relying on voice is just impractical.