Because your husband(probably) doesn't have the qualifications to figure this out. I'm not saying he's stupid, but that would be the case if he removed the post.
The replacement structure would depend on the loads involved over this area. I have 2, 10" steel "I" beams, 6' apart in my basement and still have steel columns every 8 '.
Hopefully you have a ranch so when it collapses, body recovery won't take too long.
Ron