Aurastrike, don't let it get to you - sadly there's a lot of trolling on this forum which is better of just being ignored.

As for your original post, as has been said you don't actually need to level crafting classes to proceed in the game, that quest just requires you to learn about materia, but not actually meld any. I can't remember where the main story picks up from after that, but that quest is basically a whole heap of dialogue and some tutorial windows explaining about how to make materia. Once it's done that's it. The storyline continues with another quest, which doesn't require crafting to do.