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

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.

Child pornography

False advertising

What actor accepted a film expecting to go unnoticed, only to find himself at the forefront of a gigantic success that transformed his career?

HIPAA violations

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.

Freedom of speech does not apply to:

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Terroristic threats

Revenge porn

Insider trading

What is it like to date a women 20 years younger than yourself?

Perjury

And much, much more.

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.

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Revealing classified information

Insurrection

Conspiracy

Why does Rahul Gandhi have so many haters?

Threats of violence

Trade secrets

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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Fraud

No freedom is absolute.