It's "meaningless" because if you broaden out the definition of "value" to "anything that will make people interested in what you're doing", the advice turns into a tautology.

It's still helpful to remind people that an audience will not care about what you are talking about until you tell them, in any way, why they should.

So describing a fun problem is implicitly telling the audience why they should listen.

And yet a lot of speakers still seem to need that self-evidently true statement pointed out to them. Tautological advice isn't necessarily bad or useless, especially for beginners.