Imru al-Qays
Banned
Neither are that big. You can run from Gaping Dragon to Firelink in 2-3 minutes.
1. Assuming you know your way around the Depths, which someone playing through the game their first time very well might not. Part of the pleasure of Dark Souls is mastering the geography of the world so you can do things like get through the Depths in three minutes, it's not something that everyone is able to do from the moment they pick up the controller.
2. You picked an arbitrary point less than halfway through the Depths-Blighttown descent into darkness. Making it back from the Depths is one thing, making it back from the upper Blighttown bonfire is another thing, making it back from the lower Blighttown bonfire or Quelaag's is something else. The deeper you go the more oppressive it feels until you finally stumble on that shortcut - which you don't even realize is a shortcut back to Firelink until you're at the top of it.