Very good! Much like the other Matthew 25 parables. Each man was given money. Each virgin was expected to be ready. Some were, some used their gifts, some did what God required them to do. And others did not. But the sum total of people in each of these cases were all considered in the same class, initially. Matches well with Matthew 7:21 (Lord, Lord...). Of course, we know from other Scriptures that it is not works alone, but faith AND works. Thus, we understand, as you point out, that faith is indirectly involved and presumed.
Which reminds me once more: Luther never read the gospels
Yea, he was worse than Marcion. Luther would have us believe that Romans and Galatians is the "Gospel".
Regards
He never got past the first three chapters of these either.