This does seem to be true in the age of throwing all data in to training the next iteration of the God Machine, but also, some data is a lot more valuable than other data and I want to know what the incentives are of people who are collecting data in our homes and what the actual data / derived data that they're after.
big thing is to be able to serve ads more effectively
so if you know that a user is having an affair, you might want to serve divorce lawyer ads (I'd imagine those are very expensive) or something.
this kind of data though is just like a cog in the machine, but it can e.g. give enough info to know how many people likely are in that household, and so on. useful when combined with other signals