Whats the reason here ? Is it just a sales or marketing issue or is there a fundamental flaw with how these products integrate
My mom doesn't know that every website she's been to, emails she's read or written, purchase she's made via square/amazon, message she's typed on Facebook, show she's watched on the smart TV, etc. is being aggregated and used in various ways to sell her stuff.
Since it's all behind the curtain, she'd rather just not deal with it.
Privacy is something that needs to be regulated because the cost of caring about privacy is learning about complex systems and being paranoid about how they are/could be used.
It also creates a hazardous conflict of interest for companies selling privacy: "Let me scare you about your utter lack of privacy online and then sell you a product to reduce that fear in a very small way that doesn't really meaningfully make your digital life more private."
It's just a small market. Granted, it's a growing market. See things like Duck Duck Go, Plausibly, etc.