Why are some remediation suggestions textual instructions instead of a Terraform/JSON file?

We currently provide remediation Terraforms only for cases where we are confident about the effect of applying a ‘Deny’ over a certain policy. We refrain from this where we do not have enough information. As part of our roadmap, we will be collecting more information from CloudTrail, which in turn will allow us to provide remediation files for additional cases with greater confidence.