I have read a passage in Wikipedia about the List of unsolved problems in physics and dimensionless physical constants:
Dimensionless physical constants: At the present time, the values of various dimensionless physical constants cannot be calculated; they can be determined only by physical measurement.[4][5] What is the minimum number of dimensionless physical constants from which all other dimensionless physical constants can be derived? Are dimensional physical constants necessary at all?
One of these fundamental physical constants is the Fine-Structure Constant. But why does Wikipedia say that these constants, such as the fine-structure constant, can be only measured and not theoretically calculated?
The fine-structure constant $α$ as far as I know for the electromagnetic force for example can be theoretically calculated by this expression:
$$ \alpha=\frac{e^{2}}{4 \pi \varepsilon_{0} \hbar c} \approx \frac{1}{137.03599908} $$
So why then does Wikipedia say that it can only measured but not calculated? I don't understand the meaning of this above-quoted Wikipedia text?