I also dont prefer voice msg due to same reason above. Especially when I must spent twice the time to double check the requests verbalized.  And then must scroll back and locate the chat again  to confirm what I done is in accordance to the voice request.

 
Anything verbal tend to have "noise" amongst useful information since humans arent robots.. cannot immediately start with "Please do A and B, and make sure X is accounted for". Same goes for meetings as well... sure must have "introduction" to prep up the audience.  
What I always fear are succesive voice  msg that cancelled the earlier ones.
msg 1:  "I was eating a nice chicken rice and suddenly have an idea.. why not ........... " 
msg 2: "ok ok... ignore my previous request. I think its not practical.  maybe we should....."
msg 3: "Hmm... lemme return to office and think further. dont do anything first"