I see two types of kit here.

First aid, and long term or second aid.

The first aid is for keeping you from dying in the first few hours
of illness/accident.

The second aid is to enable your to keep functioning and in as
near a state of comfort as you wish to be.

A pure first aid kit could leave a lot of that stuff out.
Duct tape, telfa pads, and aspirin can get you a long way.

However, something like an eye infection or a poison oak rash over
much of your body can end your trip for comfort reasons. I like to
keep things in a resupply box that may not be needed the whole trip, adding them when the yellow jackets come out, or I will be
down low enough to get into poison oak etc.