I think the no talking restriction is important. Dr Kim explained to me that I should really try to not talk and even keep coughing to a minimum for 4 weeks after the surgery or even after the Botox in my case (making it a total of 5 weeks). The reason is, the would the ycreate needs 2 months to heal and grow together in a nice way, there is also scar tissue forming that stabilizes the new commissure which takes some weeks to form properly. In that time, the whole thing should be kept rather calm to heal well, otherwise it may be deformed or scar in the wrong way. So talking too early would then cause maybe a deeper or hoarser/breathier voice in the end. It is part of why Dr Kim also uses the permanent sutures - they last during all the 2 months, so there is no riskafter 2-3 weeks when other sutures dissolved to do damage.
It seems individual though - some seem to be allowed to talk earlier, some later. To me he said not to talk until week 5 post op, if I slip a few times with 1-2 words a day would not be so bad though. Better would be not to do it though. And until 2 months post op I should still keep it low.