[Too]

A lot of the criticism from OP is assuming that the slides exists in a vacuum and that the slides are the presentation. Short bullets? Yeah? It's just a reminder of what was presented in the main talk. They are not supposed to contain the complete content. Now unfortunately, a lot of presenters do the same mistake, get nervous, forget what they were supposed to say and let the nerfed bullets do the talking. Worst style is when they know beforehand that this will happen and add more and longer bullets to compensate for it. Death by powerpoint, guaranteed.

That's not to say bullets are great, the 6 level columbia slide is absolutely horrendous and bullets should not be the first tool one reaches for, contrary to what powerpoint easily invites for. Prefer a good graphical visualization of the raw data and annotate it with insights to back up your main argument, then let your slides back up your talk instead of being driven by them.

There is also the argument that slide decks tend to outlive their verbal presentations, because we are too lazy to create both a slidedeck and a properly written paper. Resulting in confusing low density bullet-lists being shared around. Here, a information dense presentation help, but it's usually not enough and often forces compromises to the main presentation.