How much of your life has the United States been at war?

75%

Looks like less than half: 42.2%

That's still quite a bit, and it doesn't account for the Cold War that we lived under until the early 90s.

I also don't see the limited "conflicts" that were were periodically involved in.

To address the second part of your question, I do believe that we should be concerned. Warfare is expensive in every imaginable way, and the US has significant shortfalls in critical areas such as infrastructure, education and health care.

Even more than the economic and financial capital, I think we need to direct some of our collective talent and intellectual capital towards solving the domestic issues that we face and creating a more equitable, less vitriolic society.

I am not optimistic that these changes will occur.

Too much. I enlisted in Dec 1971, Vietnam was still hot, got orders for Tan Son Hnut AB in Saigon, but the Vietnamese heard I was coming so they sued for peace. That war ended in 1975. I was on active in the UK when Desert Storm was ramping up and undertaken. I caught the tail end of it (deployed) from Panama. I was in Kuwait from 2000-2003 so I caught all of Enduring and Iraqi Freedom. We need to take time to rest and recover our forces.