Many speakers use bullet points to remind themselves what story to tell the audience next. Turn back to audience, say “Uh, and also...” Read out bullet point. Turn back to the audience. Then, improvise (often a very engaging) story.
These people actually do not need slides at all. The story is in their head, they just need to be prompted to get the flow going. Two solutions:
Use simple speaker cards instead, and forget about slides all together
Create highly visual prompts: a picture, a slide with just one word on it and use presenter view to avoid having to turn your back on the audience