It's to do with clarity. I can slow myself down in conversation with someone, but in those extremely short exchanges with someone, where all I need to say is "okay" or "yes" or "no", they turn out problematic.
That's because they sound a bit like grunting. Try saying "okay" really fast, and you'll see where I'm coming from. I wouldn't say it makes a great impression, especially with acquaintances.
This article was written on 12/09/2023. If you have any thoughts, feel free to send me an email with them. Have a nice day!