As the communicator your job is to ensure that the audience gets your message. This slide is so comically bad that I wouldn't expect anyone to understand the gravity of the situation after seeing it.
If this was a presentation done in high school they would have gotten a failing grade. And I think we can expect more from university educated people.
I get this viewpoint pragmatically as nothing is going to change, but my point is that we can expect utterly nothing from the audience and excuse their refusal to do anything beyond accept Twitter feed like input.
If someone wrote "I approved the landing as the title of the slide did not seem alarming", that person would be resoundingly rebuked. That would be an outrageous official rationale and the person would be regarded as lazy and negligent.
But that is practically what happened and what we excuse.
But it's not a high school presentation done for the sake of doing a presentation. It's not an audience who will review the performance. It's giving information to _professional_ _experts_ who are _responsible_ for consuming that information.
I agree, we can expect more from the presenters here.
Experts are humans, experts get bored, experts can't necessarily follow your bad presentation.
Underneath it all we're smart monkeys, not robots. You can't force yourself to pay attention indefinitely. It's not in our biology.
No matter how smart you are if you hear hours of presentations in a day, you will only take home a certain maximum amount of the stuff that seemed important.
If you're a presenter, and you have something life-and-death important to say, you should repeat it, you should put it into simple words, you should use appropriate language, voice and maybe even pictures to make it clear.
Experts are human but it is their responsibility to not get bored in an important presentation regardless of the presenter. That responsibility means the fault is assigned to them and not the presenter.
I agree with your last paragraph but after any bad event you could point at the presenter and say "I didn't consume the information they were providing - therefore blame them not me"
If this was a presentation done in high school they would have gotten a failing grade. And I think we can expect more from university educated people.