It is, in cases where it works, probably the best available method we have for finding the truth.

But there are a lot of questions it cannot answer, it can still give the wrong result just by chance, and the results are only as good as the assumptions you made. The last point is particularly important, and can allow bias to creep in even when all the experiments are done correctly.

Finally, real scientists often do not (and sometimes cannot) follow the scientific method perfectly, due to all sorts of reasons.