I understand that it's often easier to express something with a quick voice message, rather than writing it up. But is it searchable? Is it coherent information that I can refer to, copy and paste? Is it efficiently consumable?
No. More often than not it is a meandering, unreflected ramble with low information density.
You also can't fix mistakes or reword something in a voice messages without re recording the whole thing, so you just leave it as is. Or record an addendum.
Voice messages are more convenient for the producer, but are always more work for the consumer.
Automatic transcripts help a bit, sure. But they only go so far. Both because of accuracy and because of different structure to the content.
I can see niches where this is useful, but I very much do not want to be bombarded with voice messages in a professional context.