No you don't. You can technically stay 180 days and not do the report, as long as you don't need anything from immigration, like a certificate of residence to buy a vehicle or similar.
Anonymous participant anyone can apply to any visa. But each embassy can make their own decisions to approve or deny the application.
So we could all speculate, but no one can answer that either. Someone might have already done exactly this and gotten the DTV, but that wouldn't change the fact that your application might be totally different and get denied.
You'd better keep the DTV if you don't think the potential job is for you.