To me, sketching is just another way of communicating with people I live, work and hang around with. It's a natural, human, visual expression; almost all of us could draw before we could write. The reasons why we stop communicating this way seem to mainly be societal and either artificial or external to our actual abilities.
Choosing to sketch or not is up to you. It's a skill that we can get better at with practice. It's not a side skill reserved for artists and designers. There are very clear benefits to including it in the way we think, work and play.
So, for me the question you're actually asking, @vbasic_41, sounds like "What are the cons of communicating?"
What happens if we stop speaking or writing or using our body language?