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

False advertising

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.

Insurrection

What is the reason for writing X^2 as XX instead of X*X?

No freedom is absolute.

HIPAA violations

Trade secrets

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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.

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.

Insider trading

Does sleeping with earbuds cause ear pain?

Conspiracy

Perjury

Revenge porn

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Terroristic threats

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.

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Freedom of speech does not apply to:

Threats of violence

Child pornography

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Revealing classified information

And much, much more.