Which would end in...?

You go in the booth, it's Option A or Option B. You fill in the box. Nobody cares why.

What you've said here is a meaningless non-answer based on culturally ingrained prejudice.

In reality, we already don't require old people to actually have or demonstrate either of those things.

Sheltered people and hermits aren't denied the vote. They don't have to have experienced anything but the passage of time, regardless of how little they've filled it with.

People who watch lies on purpose aren't denied the vote. They might have no understanding but misunderstanding and still are able to steer the course of the country based on delusions and propaganda.

Think of every garbage politician you've seen get elected. All the damage they've done. And realize that old people elected every single one of them.