This is the "wrong result can be justified on a technicality" argument. But a wrong result is just a wrong result. How you got there is immaterial except insofa

This is the "wrong result can be justified on a technicality" argument. But a wrong result is just a wrong result. How you got there is immaterial except insofar as it offers you clues on how to fix it. Mathematica is well equipped to recognize the circumstances that produced the wrong result, and produce the right result instead. That involves work, but Mathematica has kept a stranglehold on the product specifically in order to extract the revenue that could be used to pay for such work.