The Canadian Privacy Commissioners disagree with you.
Well, they can all they want to but it's not going to matter. About the only choice Canada will have in the matter is to block any and all social media sites from the internet.
Good luck with that.
Second coming of Cambridge Analytica.
It's not just that. The social media companies themselves collect the data and sell it. They're all doing the same thing.
It's one thing to show your friends some pics of your beach vacation. It's another thing entirely for data farmers to come in, take all that, build data repositories of you and sell it to interested parties based on different criteria.
I have a word for you: responsibility.
There's a reason people generally don't wear Nazi uniforms to work. Used to, they did that sort of thing at home, alone, with the blinds and curtains drawn.
Social media however has brought them out of the closet. The very same stupidity (posting everything on social media) that is helping to call out and apprehend law breakers is the same as those who contribute to data farmers.
Every single one has an agreement you sign. Nobody reads it. It literally gives them the right to do anything they want with what you contribute to them.
There's a similar law on the books in most jurisdictions called "exhibitionism".
Here's how it works: A couple is having sex in the privacy of their own bedroom. They neglected to draw the curtains, so you sneak around back to get a better view and watch them.
That is invasion of privacy and you'll go to jail for it.
BUT
If that same couple lives in a condo on the beach facing the boardwalk where hundreds of people per hour walk past their bedroom window, and they decide to have sex with the blinds open every afternoon in front of everybody, that's called exhibitionism and anybody that looks, takes pictures, or whatnot is not breaking any law at all.
This is the same thing. Nobody is "stealing" anything from anybody. Nobody is sneaking around back to look in a window. They're simply looking at all the exhibitionism people hurl piece meal all over social media and finding a market for it.