What is there to be confused about? They can speak english correctly, but they simply refuse doing so due to a lack of respect for the language. Almost every professor at my uni is also like this: they have the skills to follow grammatical rules, but they don’t owe it to anyone to actually do it. This is normal.
I’m confused about the single full stop. It shows they have knowledge of basic punctuation, but refuse to use it.
What is there to be confused about? They can speak english correctly, but they simply refuse doing so due to a lack of respect for the language. Almost every professor at my uni is also like this: they have the skills to follow grammatical rules, but they don’t owe it to anyone to actually do it. This is normal.
Also any language where through and threw sound identical doesn’t deserve much respect.