It's easy to make things that are complicated. What's difficult is to make things that are simple.
And because it is so much easier, we tend to make things more complicated than they need to be. We assume that a problem is complicated because we haven't understood it yet.
The fact is that most of the time, it's not Rocket Science.
And we don't often enough take a moment at the beginning to figure that out, do we?
Hence, these shirts.
Just a way to remind us that things are often simpler than they seem, and that we get into trouble when we don't understand that.
And the rest of the time? I've got a shirt for that, too.