Hello @loisreed
Sorry for any inconvenience that might have been caused due to that.
We have a filter in the plugin to delete all the data added by the Rank Math plugin. You can check here:
https://rankmath.com/kb/filters-hooks-api-developer/#clear-rm-data
Since SEO plugins are vital for any website, we can not simply delete everything related to it if someone deletes the plugin (accidentally or intentionally as we would not know).
It is the same with all the other SEO plugins as well.
However, with the Rank Math plugin, you get an option to delete everything related to Rank Math by following the guide linked above.
Hope that clears the confusion. If there’s anything else we can help you with, please let us know. We are here to assist.
Take care!