One thing someone pointed out to me when I was questioning buying a suture kit if you don’t have the skills to use it is that you don’t know if someone in your circle (a neighbor perhaps) might have the skill but not the extra supplies to use.
Personally, I try to gain as much skills as I can, up to Wilderness First Aid courses. And, while I know that if SHTF, we’ll have to make do, if it’s not a complete breakdown, I want the ability to shelter in place and care for my family for as long as possible. I remember the family stuck in quarantine for 21 days during the Ebola scare. That’s basically my gold standard for medical scenario prepping — being able to set up a home quarantine for 21 days if necessary.
Just went through a period of DH being radioactive (thyroid treatment) for a week where we all had to wear gloves (radioactive sweat was a potential concern) and he couldn’t be closer than 3 feet to anyone in the home. Having plenty of supplies in the house made that way easier than it might have been otherwise.