That's quite a broad generalization. For sure a lot of the biggest names have done ethically questionable things. It's no doubt that growing that fast and gaining that much power is going to hugely amplify whatever ethical flaws the founders have. And no one is ethically perfect. That's not to excuse Uber, Facebook, Google, Amazon or any of the more egregious companies.
But it's just a case of confirmation bias if you didn't look for counter-examples to try to disprove your theory.
Are the following companies ethically perfect? I doubt it. But I haven't heard much bad about them and they have changed my life for the better significantly: AirBnb, Dropbox, Stripe, Rappi, WhatsApp, Square, Netflix. I bet I could find others.
I agree that folks have very good reason to keep a much closer eye on what WhatsApp actually does, and also what the user agreement says. However, you can't say that the WhatsApp team or product is necessarily and already violating people's privacy in the same ways as Facebook is. You can have all the healthy skepticism you want, but it doesn't mean that WhatsApp is doing those things.
But it's just a case of confirmation bias if you didn't look for counter-examples to try to disprove your theory.
Are the following companies ethically perfect? I doubt it. But I haven't heard much bad about them and they have changed my life for the better significantly: AirBnb, Dropbox, Stripe, Rappi, WhatsApp, Square, Netflix. I bet I could find others.