When I took my last "wilderness oriented first aid" course, I was struck by how these folks seemed to just assume the "weight vs. safety" trade-off should always tilt towards "safety" for anyone they considered to be responsible. They didn't quite come out and say it that way, but I had a sense that each of the instructors carried a relatively huge amount of medical supplies whenever they went in to the woods.
I'm certainly not saying that's "wrong", just that it isn't necessarily for everyone.
From the specific list at the start of this thread:
To irrigate woulds I'd take the bite valve off of my platypus hose.
Triangular bandages: if in need I'll make the conscious choice to cut up some existing piece of clothing or outerwear to make one.
Tick removal: my tiny knife includes small scissors and a small tweezer, which in fact I used to take a tick out of my leg with on the AT.
Salt: generally I have lots of salty foods with me.
Many of the things on that list I do agree with and carry anyway, though not all primarily for "first aid" --- aspirin and tylenol for example, ziplock bags, safety pin, moleskin, a watch.
I guess I just agree with whoever said earlier that it's a natural progression to take stuff out when on an "ultralight" kick, then add a lot back in right after a first aid course, and then to back off and take some of that back out for a more long term, steady state first aid kit.