Thus there are two answers: it is a particle and it is wave. Thus, they gave a metaphysical explanation to a physical problem.
I think you have jumped to a conclusion that might not be warranted. One could also argue that the electron is both a particle and a wave, but our understanding of the physical world is not yet sufficiently sophisticated for us to be able to comprehend that fully.
So to answer the question 'In this particular situation, will it be a particle or a wave?' you have to depend on probability, and this gave rise to QM.
You could equally well say that the answer depends on the nature of the question you ask.
If you ask question "A", the answer will always be that it is a particle.
If you ask question "B", the answer will always be that is is a wave.
Probability doesn't enter the scenario.
