
… to do market study means that the product will be completely driven by specific customer requests. At some point, the company will become so culturally embroiled in this that they will find themselves always building for one big customer and culturally unfit to build market features.
…ews spreads in the market and it will be harder for your sales to get a foot in any door. Secondly, Sales & Pre-sales are trained to find fits whereas Product teams are trained to find gaps that they need to build for. So feedback from Sales on product features needs to taken with a pinch of salt.