Network security was too often viewed as separate issue to the design of the network itself, which led to solutions being poorly thought out or hastily cobbled together at the end of the project as an afterthought. As more workloads and key data assets move to the cloud, and work from home becomes a more common reality, the private network has become more of a security overlay on the public internet than a separate entity. This shift calls for a change in thinking, with battle lines being re-drawn, with tighter and closer integration of security and networking technologies.
Source: https://www.helpnetsecurity.com/2021/08/09/security-matters/