We're all so bad at communicating and it is the bottleneck in most relationships, workplaces, and in politics.
We talk past each others when we argue. We're bad at definining the stuff we argue and talk about. We're bad at ignoring the pedantic stuff and focusing on the "spirit" of the argument.
At the workplace I feel the ability to share information to all the relevant parties without it being noisy has never been solved in big corporations. It is either a free-for-all situation where you're expected to read hundred of emails, answer anyone anytime, go in tons of meeting, OR to work in complete silos where you only talk to a supervisor once in a blue moon.
In friendships you have people who talk but don't listen and people who listen and don't talk. Oversharers, bullshiters, people who can't get to the point, people who gives 5 minutes of context and disordered information for every little things. Friends who mumble, or who don't finish half their sentences.
In relationships we let unresolved issues become taboos, and we let petty stuff buildup because we can't addresss it without anyone feeling attacked.
Communication is important, as you've already been told by a poster or an HR person, but I rarely see people actively try to better themselves in that area, nor the corporations I worked at. You won't have anything durable without it, or anything capable of scaling efficiently.
I am probably very bad at it too, for the simple reason that virtually all the people I know are ever good at best at a few aspects of it. I am self-conscious about communicating properly but I too probably suck at it and I have my blind spots just like everyone else. For this reason, this is the thing I hate about everyone, we can't communicate for shit and we don't even realize it most of the time.