Using high-level academic words all the time or using convoluted language necessarily enhance the importance or impact of what someone is saying.
However, it is true that using complex and unclear language has its own significance! It matters to those who truly know how to write and speak well. It matters to people immersed in linguistics, cause it helps them to stand up.
It has always been important for writers cause most of those who were convoluted or pretended to say something important by using meaningless sentences have ended up in the bin of history.
I personally think that the use of confusing language is a very big inferiority complex of people who have a lack of talent for writing or mental deficiency in articulating the words ( or no education) that want to hide.
This is not absolute.
This is just my analysis of certain persons. I’m not talking about you but in general.