It's not uncommon for people to overvalue the importance of demonstrating their competence and power, often at the expense of demonstrating their warmth.
Being a comfortable public speaker, which involves easily being able to go off-script, strongly signals competence.
Too many of us suffer from pervasive feelings of personal powerlessness. We have a terrible habit of obstructing our own paths forward, especially at the worst possible moments.
Charisma seems to be more about the intoxicating quality that you have on other people, as opposed to presence, which is more about the self in relation to others, and how you feel you represented yourself in a situation, and how you were able to engage. So it's less about how others see you and more about how you see yourself.
There are plenty of reasons to put our cellphones down now and then, not least the fact that incessantly checking them takes us out of the present moment and disrupts family dinners around the globe.
Authenticity doesn't just mean you're not filtering what you're saying, it's about being able to know and access the best parts of yourself and bring them forward.