Multiple databases in postgres fundamentally share the same underlying infrastructure (i.e., WAL), and so do not offer much in terms of scalability or blast-radius protection compared to putting all tables in the same database.
I'm surprised to see the Portal listed. We have one for letting the grandparents talk to the kids, and it is the most unreliable piece of technology I've owned. Constant connection issues and laggy UI.
I find it pretty odd to speculate that they are experiencing a very specific failure mode of a particular database. Do you even know whether they use Postgres?
The "good reason" is that considering 12am the "middle of the day" only makes sense if the typical sleeping window was 8pm to 4am (making midnight the "middle of the night").
This is partially due to liability: if someone slips on a wet spill and hurts themselves, Whole Foods is liable if they haven't been taking reasonable measures to clean up such spills in a timely fashion (1/hour). Scanning is a way to later prove that such cleaning was happening.
As a parent, it's hard to remember that ending a weekend "recharged" is a common experience.