Well, I’ve been involved with an outfit that involves fairly regular speaking gigs (from just a couple, to a couple hundred) for 40 years.

I’m not consistent, so I’m not on anyone’s shortlist for keynote speaker, which is fine by me.

For classes, though, I practice for hours. It seems to satisfy people.

I understand. If it's mandatory informational or community volunteering, there's not much drive to invest heavily in a particular skill like make speaking production value into quality infotainment.

When it's a skill interesting or essential enough to improve it might be worth for speakers to move around trying different support organizations to get new perspectives, and different techniques and feedback.