I had a 10 year background in fire/EMS before getting in to tech, and have "sneaked in" ICS concepts and practices to several of my employers and teams.

I tried to introduce the ICS concepts formally and up-front, but met a lot of pushback; "we don't need that", "we're not dealing with fires" or "it's too complicated".

By using ICS principles without calling them such, people usually see the value. I even got a sizable promotion and raise due to my "clear and concise handling of several serious incidents and putting procedures in place to handle similar in the future". All I did was direct people in to ICS functions and act as an IC.

I agree that ICS concepts should use used more widely and outside of just emergency services, but getting past the "stigma" of the title is the hard part.