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

No freedom is absolute.

And much, much more.

Threats of violence

What is the best way to get revenge on people who hurt you?

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.

Child pornography

False advertising

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HIPAA violations

Insider trading

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.

Verdict in trial of Rays shortstop Wander Franco to come Thursday - Tampa Bay Times

Revenge porn

Freedom of speech does not apply to:

Revealing classified information

Can a white person wear a bonnet to bed?

Fraud

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.

Terroristic threats

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Perjury

Insurrection

Trade secrets

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Conspiracy

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.