They don't (I sure didn't know who I would vote for and why at 16) but that doesn't mean it needs to stay that way.
This could present an opportunity to have a few classes still in school explaining why voting matters and why making an informed choice is important immediately when it gets relevant.
They had 6 months of testing with release candidates, although you are not entirely wrong there are bound to be bugs still. Plus this release is almost entirely DB related refactoring, so you are not wrong about the maturity side either.
That's just what you get when you fork a codebase with no care about code quality (hopefully after this it will be in a good place).