I really think that is the way their brain prints it out in their head and here we are.
We are in the middle of the new age of American illiteracy. Not just minority and immigrant groups. There are many normal looking White people in college who cannot read, write, or do even rudimentary math. All of these are high-school graduates.
It has become common for a secretary or colleague at work to write in internet slang and emojis, because that is all they know.
C U b4 I go a la casa. Not trying to be cute. This is how they write, I will stop by and see you before I go home today.
It is normal for them, even in a business setting. It is all they know.