This has never realistically been the case. An illusion of control is provided by facebook, but they've never really put much effort into it. For a really simple example, look at how long content remained available to the entire internet after "deletion". Sometimes it took years.
Expecting any semblance of privacy from a company who profits from using and selling your data is, if I'm being blunt, lunacy.
In other news: your partner may also leak your most intimate secrets. I hope they do, to teach you a lesson?
Every trust can be betrayed. Why do you believe a world without trust would be better? Only because you cannot handle the nuance of different levels of trust?
Indeed, and that's why it's important to choose the right partner. Likewise, it's important to choose the right friends on instagram to share your photos with. Because as you noted, they can always screenshot away and there's nothing Facebook can do.
What's dangerous is thinking that Facebook/Meta is the keyholder. That's a false perception, perpetrated by Facebook because they want to monopolize everyone's data. It was and always will be about the people who you share your information with. Don't want your profile scraped and leaked? Don't share it with sketchy people.
The reality of the situation is that Facebook is a walled garden built on the labor of it's users and it is objecting to those users reclaiming the fruits of their labor by scraping.
That is, quite honestly, one of the oddest definitions of freedom I've come across.
