It's not about what they mean. It's about how they convey it and how they can definitely do better... I know, because that's how I got better at it myself, and how everyone else got better at it.
It's like your mum telling you not to talk like a London gangstah-rapper.
This is true. It's also about how you appear.
I had a boss like that, "oh, they know what I mean". Yes, but you look ignorant.