This post kind of ignores basics of grammar instruction that we've known for centuries. Some people try to teach grammar from a prescriptive fashion. They tell us what the rules are, they have us memorize them, and then we can speak perfectly.

The problem is, that's not how language works in reality. Even if you had a perfect language to begin with, something with no exceptions of any kind, after 20 years people would have added their own changes. So then the original instruction that you gave, that wouldn't prepare future language learners for reality.

This is why we have to teach grammar and spelling descriptively. We're talking about what actually happens in the world when people actually speak and write in English. Of course it's nice to point out common customs and conventions, but we don't get to ignore all of the irregular things just because they're irritating to memorize.

And this is true for all languages that are used by even a medium-sized population over time. You cannot avoid it, you'll find it in every language, sorry.