Duct tape works pretty well as a mute button.
Actually all children are born with certain personality characteristics. Again some are fearful and some not, some are strong willed and some not, some are fearful and some not, etc. As much as some people would like to believe they are not a blank slate that a parent writes virtues on. For goodness sake my twins have been together from the womb on and very different personalities (both are girls). One is very strong willed and one not. One is more fearful then the other.Right they’re not adults & should be treated with even more kindness & patience. If a child “only responds” to yelling that’s a learned behavior. Again, I’m not saying I don’t ever yell when I get frustrated, but it’s not a method of parenting rather my lack of self control and/or effective skills.
What data do you have that shows never raising your voice to your children results in better adults. You don’t because there is no data that shows that-it is a belief. Different kids benefit from different strategies in rearing.