It's more a principle thing and drawing lines. Nothing in gaming affects anyone in a meaningful way. However, we'd lose a very valuable discussion point if SteamDB is closed. And then, what if Valve decide to remove the Hardware Survey because some IHVs don't like their market percentage being known? And what if Sony and Nintendo decide to stop sharing hardware sales? Basically, everyone could just stop sharing info and we'd have nothing to discuss and less knowledge.
So it's very much a principle, we just don't want our insights taken away! Particular for Pr or marketing reasons. Business is impacting too much these days. There are other things in life beyond money.
It's just a discussion point and a disagreement; not an agenda. That type of language just harms honest discussion.