As Moin points out, this would be a significant technical challenge (for limited value).
Once upon a time (when I was a customer, running a site with opinionated markdown users), I made this request, which has similar challenges: Advanced post option to override markdown linebreak setting
It too, remains in the “nice to have, but probably won’t happen list”
I think you’ve learned the trick - use those backticks.
That said, I do hear this:
There has also been a pattern over the years of adding site settings for things that may have been better off as remaining in control of the user. So if you come across other things like that, please don’t hesitate to suggest changing them.
We may not be able to prioritize them, but the ones that turn out to be higher value and lower complexity to change will have an easier time rising to the top of someone’s list.