Yay!
I don’t know where this myth originally started, but my only guess is that it might relate to vermicomposting… too much citrus waste (or plenty of other things) all at one time can be detrimental to your worm population.
As for plain ol’ composting, add all the citrus you want! The key is simply adding TWICE as much brown material as food scraps.
Yes, that’s it- As long as you’re composting correctly, you will NOT have any issues with any food scraps, including citrus scraps.
Give it a shot- composting is easier than you think!
You’re right – citrus is certainly worth composting. I just chuck it into my unused garden beds along with whatever scraps and yard debris we find and let it all rot down over time. If you’re lucky, you get a few seedlings later you can plant in the food forest.