A presentation from which there are no pictures is like a presentation that never happened. When you give a presentation you should also think about the need to have it captured with pictures for later reference.
Pictures of your presentation can be used for future reference. To be used on social media, in a newsletter, for a follow-up email or simply for yourself as a memory of for future use. To have pictures you can ask someone to take care of that. Making a selfie in front of your audience with them on the background may be an option, but not always suitable for each situation. Do make sure that, especially when members of your audience are clearly recognizable on the picture that you have the appropriate permissions to use their image.