Typically Terraform takes longer to get something working than mindlessly clicking through the console. In my experience those mindless clickthrough things end up sticking around for years even when they weren't intended to.
This is why you have separate development and production accounts: a development account where you mindlessly click through so that you can learn through the UI what's available and how it works; cleaned up on a regular basis by something like aws-nuke, and a production account where you have the discipline to only create resources through Terraform / CloudFormation etc.
