Because it lands on irrational grounds the quantum theory doesn’t make sense.
Or the outcome of the mathematically rational theory is "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 mishap that occurred within our human interpretation of Nature?
The dilemma:
Reality, which no doubt makes sense, has to make sense to our human minds.
The no-doubt-mathematical-faultless theory's outcome, doesn't make sense to our human minds.
As such one is tempted to seek an alternate theory that:
Makes sense to our human minds.
And is just as faultless as the current theory yet also logical as to satisfy our minds.
And what applies to the quantum theory, unfortunately also applies to the theory of relativity.
In short, on the grounds of what makes sense, the outcome of physics' "faultless" theories do not match "reality"!
Amazingly there is an alternate that offers a solution to these dilemmas!
There is at least one alternate that at the same time takes care of the dilemma and keeps relativity faultless!
That alternate, called gravimotion, is presented in the following three steps:
This writer discovered an arbitrary assumption (a human idea accepted without proof) at the very base of physics' relativity theory!
Newton's theory is also resting on that very same arbitrary assumption.
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"!
That arbitrary assumption is the alleged interaction that exists between Einstein's space-time-curvature (or Newton's force of gravity) and mass.
In physics, Einstein's space-time-curvature (or Newton's force of gravity) acts on the mass of the apple to make it fall on Newton's head!
An alternate assumption that makes as much sense if not more, can be made, and is introduced in the following.
This alternate assumption consists in assuming that earth's space-time-curvature interacts with the apple's own space-time-curvature and not with the apple's mass.
That alternate assumption doesn't concern physics mathematical edifice, which as such remains "faultless", but which now stands on "shaky" grounds!
Gravimotion alternate interpretation of Nature evolves in an entirely new thinking territory, far from physics, in which mass disappeared for instance.
GRAVIMOTION's idea...is simple.
We are living in motion!
Both time and space are fictitious.
This seemingly innocuous idea goes against physics fundamental tenets though!
The belief in science is that space and time are entities to deal with, motion is not.
Motion is identified to rest (to nothing) in physics inertia law.
This different assumption that is gravimotion's interpretation of gravitation, is introduced online, click: The 4 generations of the human concept of gravitation.
Furthermore that new assumption, which is at the base of this writer alternate to physics is exposed in details using geometrical models in the book (click):
In the eyes of this writer, there is another "human idea", now at the base-of and used as the foundation-of the quantum theory and which could use an alternate.
This human idea namely entropy and its alternate are analysed in the book of the author and also introduced on line at Entropy and the Quantum Theory