People always get this aspect of constant monitoring wrong. It's not that you're important. You're probably not. Your data in aggregate with everyone else's is. Whether you believe that companies should get all this stuff for free[1] is a matter of personal perspective.
Where the problems actually begin though is that the ambient data collected on you is way more useful than the stuff kinds of stuff you're thinking about, I.E. what you eat, or what you watch. Given enough data it becomes possible to start making deductions about some pretty surprising things. Current tech is not at this level, as, with the exception of phones/smart watches, the tech has no reliable way of disambiguating between people in a household, so the data is too noisy. That will change. You probably don't want your health insurance company[2] being able to determine whether you are prone to depression, or stomach disorders. You probably don't want you auto-insurance company to know that you suffer from insomnia, or are just a little too fond of playing video games past a sensible hour at night. You probably don't want prospective employers to be able to purchase that kind of information either. This could very easily be what the credit report of the future looks like though. The devil, as always, is in the details. It's the small data, not the big stuff, that will pose the greatest challenges for policy makers over the next few decades.
[1] Opt out isn't a thing. You're implicitly/explicitly opted right back in by everyone you interact with.
[2] HIPAA is not applicable here.