Well 99% of the use of language is for thought not communication.
Also, People that are considered to be good at language skills (public speaking, writing) are either politicians, writers of fiction or seducers.
These fields have one thing in common they are normally about deception/changing the way people think about something. Not exactly communication.
We know that language is very bad for communication if we try to transmit scientific insights like climate change or health advice.
This explains why scientific fields had to invent their own notation like benzine rings, maths equations & free body diagrams to make communication of ideas more effective instead of the verbose, unexact tool of natural language.