Data science often fails to achieve its full promise in many companies for the same reasons mergers do not. It is like turkeys voting for Christmas. The people required to participate in the change will very likely, or see themselves as very likely, to lose control as part of their participation.
Just as mergers often fail to live up to their promise, so have many data science teams. A KPMG study indicated that 83% of merger deals were unable to boost shareholder returns. And, while I think data science has received general success in companies that have built teams, at many companies it has far underwhelmed its promise.