You're going to waste more time setting things up by hand. It's also error prone, and when you have to replicate things across environments (dev, test, prod, at a minimum), you'll spend a ton of time figuring out what you missed.
The console is really only meant for prototyping. AWS should really emphasize this more.
As an aside: argonaut sets everything up using terraform (everything is autogenerated from templates), though the tf code itself is not yet exposed to users. We're working on that functionality soon.