It is worthless, in fact. Because it's not actionable. Read what the above user said again :

Every time I open gimp to try and get acclimated to it, I close it back out of frustration. Nothing is intuitive in that software. Not even the naming of the tools settings.

Nothing in here is specific enough to do anything about it. Imagine you're a developer, and you read this. What do you do ?

As users, we may not be able to program stuff, but we can do so much design work. Making mockups takes some time but it's within our reach. Let's all contribute to the best of our ability. If all a user can say is "Nothing is intuitive", then their feedback can only be dismissed. Because it's not actionable.