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

No freedom is absolute.

Insurrection

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.

What bait should you use for ocean fishing?

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

Fraud

Mariners' vibes turn ugly after sweep: 'Nobody feels sorry for us' - The Seattle Times

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.

And much, much more.

Threats of violence

Why do I (45, male) feel like I'm crushing on a girl (19, female)?

Freedom of speech does not apply to:

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.

Why would a girl not want you to know she has a crush on you?

Terroristic threats

Conspiracy

Revealing classified information

Is Pampano safe to eat?

Revenge porn

Perjury

False advertising

Is it okay if I sleep with my brother without my husband knowing?

Trade secrets

Insider trading