This tool doesn't enforce how you use rsync, it offers suggestions. You can use rsync's flags that help with versioning by modifying 1 config value to add them and now you have versioned backups using all of the strategies rsync supports.
It's also a nice excuse to build in quality of life features that don't take a lot of time because you're using the thing all the time. My favorite one is the color coded rsync command output when DEBUG=1 is set so you can be absolutely sure your config values are producing the expected rsync flags and args.