Not knowledgeable on a topic? Leave it to the people you trust most.

That's not what people do.

But if certain policies are interesting it should be possible to intervene at will.

No, it shouldn't. I can find vaccines "interesting". I shouldn't have a say in whether a new vaccine is safe or not. That decision should be left to experts in that field.

I don't lack imagination. You are lacking any understanding of how policy is created and how governments function.

It's such a stupid idea that I've heard this "app based direct democracy" multiple times from the dumbest fucking guys at bars. This is the equivalent of "we just need crypto" solution to problems with banking a capital. Ironically, if we had this type of direct democracy, you'd have the most popular policies be more and more dumb "easy to understand" solutions like the one you are presenting.