The difference between "simple" and "as simple as possible" is the crux.
Mainly, the problem is that these speeches all talk about keeping things simple. In many problems, this can't be done. Understanding the simple helps. But the actual solution will not be simple. So any newspeak to get around that is just annoying.
A simple system can solve complicated things. When Rich Hickey talks about simple, he is referring to tight coupling, "death by specificity" and hard to understand concurrency. Having a system that does multiple things, isn't necessarily a complicated system. A Mars landing, which in itself is a difficult (though not necessarily complex) problem, can be solved by a simple system. An example of this is Unix. A simple system that does complicated things.
Mainly, the problem is that these speeches all talk about keeping things simple. In many problems, this can't be done. Understanding the simple helps. But the actual solution will not be simple. So any newspeak to get around that is just annoying.