The problem is that if you only do this, in the context of contemporary technology, the default state of affairs is that the ideas don't particularly contend, except at the margins.

Most people can stay mostly within a bubble of self-affirmation of ideas, building the strength of their beliefs and the strength of their affiliation to their (ideological) tribe, while not actually having to face any significant challenges to the ideas.

When many people don't even have the education to grapple successfully with the ideas, things get even worse: not only don't they enrich their perspective from the clash of ideas, if ideas clash they can't even understand who won.

So you have at least two big prerequisites for this to make any sense at all: first, things need to be structured so that ideas (via people) clash, and secondly, you need a sufficiently educated audience and set of participants so that the victor can be discerned.