There is nothing inherently bad about a Pure Drive (or similar racquet). The fact that a lot of hacks can get a way with using them means nothing. There have been hacks with bad form in every era with every style of racquet.
To me, the Pure Drive is a great choice for a baseliner that takes big rips at the ball with heavy topspin. If your arm can handle one with full poly, even better. It's an incredibly popular racquet with many high level players for this reason.
It's fine if this doesn't fit your game. To say that it will limit someone from improving or becoming a good player is ridiculous.