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

Freedom of speech does not apply to:

Threats of violence

Trade secrets

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Terroristic threats

Revenge porn

Insurrection

Why can’t my wife just accept the fact that I’m going to cheat?

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.

Child pornography

Perjury

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And much, much more.

Revealing classified information

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 is Prince Harry being fired by BetterUp CEO Alexi Robichaux, and what role did Marc Benioff’s decision to pull sponsorship play in this?

No freedom is absolute.

HIPAA violations

False advertising

Saepe ut vero explicabo illo hic aspernatur.

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.

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

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Conspiracy

Fraud