I was about to say the same thing
most people nowadays are carrying EDC, as i it not sealed, varies by person, sometimes just modern where if anything goes wrong, throw more money at, like buying cofee/extras/uber , or usefull backups/contigency like above birthday candles, that can also be used for survival ( like various peoples poncho, lighter, knife, torch etc), i have the latter when im out working for the day, and the former when its a 10 minute drive to shops and back grocery run....
but the main thread topic, a PSK TIN, thats altoids/tobacco/other tin, thats sealed, and includes E&E items like wire saw, wire, fishing etc as per loftys tin, this is primarily a military you kits gone after a bailout of plane ( without bergen), escaped being held captive , or travelling and plane crashed, all situations when you dont really have any other kit with you. so a PSK tin is sealed, inspected but not dipped in to, if its dipped in to on semi regular, then its EDC. if its backup to whats on body/backpack then its EDC ( usually, not sure about this point), if its keeping small things together in one place then its EDC, if its just n case usefull stuff when out then its EDC.....
So some people could use a PSK tin for EDC, but its not a good formfactor, its not what its designed for. Its fun when your 10 and getting started, its a fun excersise. i thnk for pilots, military, canoers, especially in foreign countries wit loads wildernes ( americas, australia) its far more relevant, but the TIN doesnt seem warranted for most people,