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.

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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Insider trading

Perjury

Terroristic threats

Why is Trump so disliked worldwide?

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.

Child pornography

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Fraud

Conspiracy

False advertising

How can someone get patrons on Patreon if they are a beginner artist?

Revenge porn

HIPAA violations

Freedom of speech does not apply to:

Why do good-looking men date homely women?

No freedom is absolute.

Threats of violence

Revealing classified information

European leaders worry they’re too reliant on U.S. tech - TechCrunch

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.

Insurrection