What if you don't have 30 seconds? What if its your apartment that is on fire and you can't get put your bedroom door or its your kitchen that is on fire and you must jump out the window in the middle of the night in the winter with no clothing on and then find out that after you went to bed a record blizard hit and the fire trucks can't come to your apartment for a few days.
When I was still in school our neighbors house (about a mile up the road was the closest neighbor) caught fire. They all got out ok but didn't even have time to put on shoes. Their oldest son had to run down the road in the snow to our house to call the fire department so we gave him a pair of shoes and socks because his feet were turning blue by the time he got to our house.
What if your at work and something happens and you can't return to your apartment?
Sure you may not need an extreme bob with a 4 season tent, generator, gps, bow and arrow, mess kit, etc but having a change of clothes and water within reach isn't extreme.