> TBF getting shoes on and off is literally 2s.

What about when you're three people while carrying a person? According to the article, it can delay them by ~30 seconds and risk dislodging the oxygen mask, the linked video also demonstrates the difference: https://www.instagram.com/p/DbqGfGfox3f/

Might seem like a small difference, but add in a stressful situation with a person almost dying, maybe being in pain, and the emergency workers trying to keep calm while also suddenly not finding their shoes in the position they purposefully left them, and suddenly the difference might be much large and also impactful.