I'll try again to explain this with screenshots for clarity.
It seemed to me that the option to Manage Accounts under Manage Google Services was the sensible place to start if I wanted to remove a Google account.
View attachment 5727529
That resulted in the following error.
View attachment 5727531
So I followed the instructions in the above error popup and tried clearing the data/cache for Play Services but that had no effect. I was a little hesitant to uninstall Play Services but I was lured into a false sense of security because "why would the popup tell me to do it if it was dangerous?".
View attachment 5727541
Unfortunately after uninstalling Play Services, I do not have a menu item to reinstall Play Services. According to the last line of this screenshot, it seems to be detecting a version 22.16.13 installed even though I already Executed the Uninstall. I executed the uninstall a second time just for good measure but it didn't seem to change anything.
View attachment 5727543
Google Play Store is definitely no longer on the tablet. How do I proceed to get Google Services back on my tablet?