It has to do with every road leads to timmies. No matter if your the commuter who pulls in for the extra large double double and toasted bagel with butter, or the transport driver who wants whatever or the hockey dad getting a pick me up at 0 dark thirty.
The baked goods by themselves are nothing special that you cant get elseware and the coffee is always reliably good. Mostly its a social thing, most of the parking lots at night are the younger set, just doing something for a relatively cheap price.
They can be annoying with the camp day shakedown, if your like me and make multiple visits over the course of the day, not to mention selling food and ice caps out the drive thru window, thus clogging up the drive thru.
Then say your town supports multiple timmies, you still have to pick the right one for your needs. Not every timmies will have the first team working when you want them too, and large Marge is forever getting your order wrong.
But at the end of a stressful day at work, or the post game show from the bar, a timmies will always be there. Your friends will always be there , your boss might be waiting in line behind you and the staff will always remember your order, just by voice alone.
declan