With many IT projects, security is often an afterthought, but that approach puts the business at significant risk. The rise of IoT adds orders of magnitude more devices to a network, which creates many more entry points for threat actors to breach. A bigger problem is that many IoT devices are easier to hack than traditional IT devices, making them the endpoint of choice for the bad guys.
IoT is widely deployed in a few industries, but it is in the early innings still for most businesses.