I think Occam's Razor applies here. iRobot is a profitable smart home product maker, their revenue/profit has continuously grown, and their IP + talent will allow Amazon to expand into other smart home verticals.
- business decision X isn't (in part) motivated by the intention to exploit the incidental access to data a product class brings
- data class Y seems worthless/redundant, they wouldn't make a business out of it
These are all key data points which Amazon drools over.
The former is not scaleable in any reasonable way and every operation is an ADDITIONAL cost, whereas the latter is generated for the products' main purpose and you merely add some storage for the harvested data. Moreover, the generated data will be much more up-to-date (plenty of renovations or updates happen without building permits, legally or not).
Sure the people who currently buy data on the black market won't all start robbing houses, and the people currently robbing houses won't all start buying illegal data to help their burgling.
But as long as the economics make sense (and it likely would - once someone has a bunch of useful data that they want to sell illegally, they'll lower the price until it is worth being bought by people), some burglars definitely will start adding more intelligence to their planning including using black market data leaks for picking houses to target and for how/when to rob them, what items to look for, etc.
And potentially you also get other people for whom burglary wasn't a feasible option before, but combined with this new tool might be. Personally I'm not going to become a burglar for ethical reasons, but for the sake of a hypothetical let's pretend that I have no ethics whatsoever and think that stealing is a fantastic idea as long as I can avoid getting caught. I still wouldn't rob houses, because it would seem like quite a risky way of making money, and with each big risk taken there's a fair chance of not even finding anything particularly valuable once you've broken into a house.
But if I could buy data leaks that I trusted which told me which houses to rob to find the best ROI items (high value, easy to carry, and maybe even located thanks to the camera of a robot vacuum), and also told me when people would be home and would be asleep.... well maybe my hypothetical no-ethics self would still find a better crime to commit, but it'd be a hell of a lot more tempting to become a burglar than without all that data!
Do you really think there haven't already been crimes committed that involves basic dumb theft but where the targets were chosen based off a leaked list of car purchases, or jewellery shop customers, or...? And not just in the era of digital data theft, go back a thousand years and I'd assume there were some "crimes of opportunity" committed not on a whim but thanks to planning enabled only by the studying of information they shouldn't have been in possession of.
A ton of things are public information to a greater or lesser degree whether you like it or not.
Create an all-in-one Alexa robot.
If an Amazon warehouse can replace a $20,000/year human with a Kiva robot, they're happy to pay $10,000 for it. Consumers, on the other hand, would find $500 on the steep side for a robot vacuum, considering they'll also need a regular vacuum to cover the stairs and so on.
Consumers' price sensitivity is why Roomba spent years with a plastic product navigating at random by bumping into things and relying more on a brush than a vacuum.
This is almost equivalent to saying that Boeing cares about paper planes because they make airliners.