Did you know 0 is not simply the number between -1 and 1? That also is irrelevant when teaching the masses! I don’t mean this to be snooty, but I hope it illustrates my point that you can emphasize something which will work extremely well for everyone in every day life.
You’re right that there are extremely rare exceptions (though even official sources like Purdue OWL and Chicago manual of style disagree on the finer points), but I will keep telling everyone you never, ever use it for plurality. I would be much happier seeing people type “there should’ve been WotLKs for users to choose between” than “I had three burger’s” on the very rare chance I see the former. I hope you’ll join me!