Bullet points and slide presentations did not start with PowerPoint. If anything, the "bullet point thinking" of the Challenger tragedy shows that we were already experts at presenting information poorly before we had software tools to make us more efficient at it.
Of course we did.
For how many decades was the transparency projector used in academia and other things?
And some of us also remember things with slide projectors where the audio went "bing" for some schmuck to advance the slide.
Power Point is bells and whistles on some pretty basic technology we've had for a very long time.