You’re talking about “the whole truth”. If the whole is true, then all of the parts are true, so photographing only a subset of the truth (framing) is still true. If a series of events are true, then each event is true, so taking a picture at a certain time (timing) is also true.

Photos capture real photons that were present at real scenes and turn them into grids of pixels. Real photographs are all “true”. Photoshop and AI don’t need photons and can generate pixels from nothing.

That’s what is being said.