I don't think you've taken in the entire thread. No one has said to use the Burngel for anything but those little burns.
No one's disputing that H&S and modern burn care is how we would treat things, now.
By the same token, not everyone has access to immediate medical care, and wide knowledge is a very good thing (
and no, I'm not advocating milk ) the OP was trying to lighten his pack, much like a lot of folks these days.
Don't panic and think you can't deal with something just because you don't have clingfilm/whatever immediately to hand
(on that note, I no longer use clingfilm anywhere if it can be avoided at all, and there are a lot of anti single use plastic folks around) and all too often first aid course providers are as much about covering your backside as they are about teaching how to effectively deal with everything from scrapes to broken bones to heart attacks.
However, latest advice from the NHS.
https://www.nhs.uk/conditions/burns-and-scalds/treatment/
Janne's advice to actually practice doing things with hands or legs out of action is practical.
Some of the places we wander you really do need to be able to get yourself out.
Right enough, nowadays we have phones, and good phone coverage, so folks rely on those.
What if it doesn't work though ?