Because it lands on irrational grounds the quantum theory doesn’t make sense.
The results of the mathematically rational theory are "irrational".
The theory for instance cannot predict through which one of two slots a particle will travel.
Now the question is:
Is the irrationality of the theoretical results due to the nature of Nature or due to an unsuspected fault within our human interpretation of Nature?
The dilema:
Reality, which no doubt makes sense, has to make sense to our human minds.
The theory, which is no doubt "faultless", doesn't make sense to our human minds.
And that reasoning, about the quantum theory, unfortunately also applies to the theory of relativity.
In short, on the grounds of what makes sense, physics' "faultless" theories do not match "reality"!
Amazingly there is a solution to these dilemmas!
Please note that whatever the solution it cannot detract the theory, because physics' theories remain faultless!
Here is a solution to the theory of relativity dilemma:
This writer discovered an arbitrary assumption (a human idea) at the very base of physics' relativity theory!
That arbitrary assumption, "taken for granted" to start with, could depart from reality and that would not jeopardize physics' mathematics!
Physics mathematics and logic no matter what remain "faultless"!
On the other hand physics "faultless" mathematical edifice is now resting on "shaky" grounds though!
The arbitrary assumption, lying at the base of the relativity theory is exposed online, click: Gravimotion: An idea that makes sense!
And an alternate interpretation of Nature, based on a new and different assumption called the gravimotion mechanism or theory has been elaborated.
The gravimotion theory, this writer alternate to physics is exposed in details in the book (click):
In the eyes of this writer, there is another "human idea", now rendering the base of the quantum theory shaky.
This human idea namely entropy and its alternate are exposed on line at Entropy and the Quantum Theory