People who struggle to express themselves often have very interesting things to say.
Witness Stephen Hawking, Helen Keller, and more than a few poets who struggle to write one letter at a time with movements of their heads.
Having a large vocabulary and being facile with words doesn't define what it takes to have interesting things to say. I have learned much from people with little education.
But I still think practice helps.
My problem is I know the words, I just can't put them together as eloquently as you and some of the others here.
It's always a pleasure to read thoughts expressed so well.