But the point still stands that what you're implying you want to see - a broad Government-run censorship campaign cracking down on free speech - is not the solution, and probably will only make things worse in the longer term.
I'm not saying your wrong, nor am I saying "free speech bad", I'm saying something needs to be done to at lest protect children from ideas like, "Winston Churchill started WW2 and Hitler was just a victim".
Personally, I'd be taking issue, serious issue, if the plan by the Australian government was to block access to libraries and history books, but that's not what I see happening here, they're to do something about foreign propaganda poising kids brains and because the companies would never regulate themselves, they're trying to do something but it seems futile.
Often these opposition parties might use theatrics, exaggeration and outlandish claims to attract attention. In some ways, this might reflect the official channels who spray a lot of fear-based propaganda initially. So there might be an overcompensatory reaction to an overcompensatory action. Not trying to excuse blanket anti-vax theories.
Vaccines are of course great inventions, but sometimes the waters get murky with pharmaceutical companies and their ethically poor track records, suddenly making huge profits and frantic politicians calling the shots on public health. Throw free-speech crackdowns in the mix, and now we have a problem worth talking about without emotion.
That's not the solution. The prevailing theme taught to kids these days is "question everything". Not taking things at face-value, or believing memes and one-line theories, forms part of the young person's toolbox these days. It really does. Their teachers are drilling into them the dangers of online misinformation.
You and I wouldn't have known the difference between misinformation and disinformation in our school days (I'm assuming you're grown up), but kids these days know all about it. That should give you some comfort.
If certain Japanese political parties are making wild claims, let the dust settle and the ridiculous stuff eventually is exposed. Don't ignore subtle variation and nuance when for example we examine the claims made about the covid vaccine and protection from transmission. Or effectiveness of masks, etc. In Australia, police were literally tackling people to the ground outside for not wearing masks. So let's not trust government issued health advice so blindly either. Let's find a middle-ground of analysis & discussion.