I agree, importing resources is a limited use-case. However... it's one I find myself in more often than I would like. Reality is often disappointing. At least, with the companies I've work(ed) with.
That said, I don't think CloudFormer does the same thing. I haven't used it before, so please correct me if I'm wrong, but to me it looks like it takes existing resources and generates a CloudFormation template out of them. But then you're still expected to upload that template and create a new stack, with all brand-new CloudFormation managed resources—is that right?
So for example, CloudFormer for an RDS instance would probably be a no-go.
In the Terraform case, after you've imported resources, there's no need to re-create them. There's the question of if what's in the template will match what the resources actually are, but there are also tools to generate Terraform templates straight off resources.
there is also a way to do this for cloudformation. look up cloudformer.