If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

No freedom is absolute.

Terroristic threats

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HIPAA violations

Freedom of speech does not apply to:

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Why are people becoming increasingly hostile to pro-lifers? I am pro-life.

False advertising

Insider trading

And much, much more.

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Threats of violence

Trade secrets

Fraud

Would the word literate carry the same meaning with public (common wealth) in 1900 vs today 2020?

That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

Revealing classified information

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.

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Insurrection

Perjury

Revenge porn

Can you show pictures of your penis, big or small?

Conspiracy

Child pornography