In an American culture, it is "self-evident" that clear communication is about being direct and to the point. But this is far from universal. More generally, western cultures tend to conflate earnest and truth. "Telling it like it is" is valued. We don't realize our own "phoniness".
I have witnessed countless times people hitting a wall in meetings and other situations because they tried to address the point "butt head". Some typical examples I've witnessed
1. French/Japanese starting a simple resource discussion. As we French typically do, French manager starting a negotiating by saying no. Gradually softening while getting given more information. Result: French manager happy at the end, happy to start project, Japanese manager extremely stressed and thought nothing was decided.
2. American engineer excited about a starting project, mentioning how "awesome" things are. French engineer unimpressed, 50 % stuff not working, think the American is bulsshiting him, decides they can't be trusted. American just wanted to share his enthusiasm and wanted to build a working relationship. I was that French engineer long time ago, I really was super confused by American optimism. I thought it was all fake, I since learnt to tune and update my mental model :)
In all those cases, everybody thought they were very clear. I now work in Japan, and what Japanese would call very clear is very different from what we would consider clear in Europe or the US.