While true, this appears to require the CLI. As above, I strongly believe that the CLI should never ever, for any reason ever, be required to install apps. Dockers are also not exactly plug and play, and some understanding of what dockers are, how to maintain them, how to grant file and folder permissions, and how to update packages is required. Your suggestion presents a new set of problems.
There exists a Docker image: https://hotio.dev/containers/radarr/. It does not appear to be absurd: https://github.com/hotio/radarr/blob/release/linux-amd64.Doc....