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

And much, much more.

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.

False advertising

Simulations find ghostly whirls of dark matter trailing galaxy arms - Ars Technica

Trade secrets

No freedom is absolute.

Child pornography

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

Revealing classified information

Insurrection

Terroristic threats

Hey girls can we see some anal play?

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.

Revenge porn

HIPAA violations

How would you feel if your friend confided in you that she is cheating on her husband, knowing that he loves her deeply? What emotional and ethical considerations would you grapple with in response to her revelation?

Perjury

Threats of violence

Fraud

How should one respond to compliments such as "You are so special" and "I'm lucky to have met you" from a guy?

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.

Conspiracy

Trump administration prepares to ease big bank rules - Politico

Freedom of speech does not apply to:

Insider trading