Yes, I agree with all the above, to a point.
The 3 guys I know that suffered horrible burns were in 3 different incidents and all involved accelerant.
2 were propane, one was methanol.

The methanol victim was about 12 years old & fooling around with a jug of methanol.
Methanol burns with almost invisible flame - you can't see it in daylight.
He thought the fire was out & added more fuel.
Burning methanol splashed onto his nylon shirt, which ignited & melted into his side & arm.
Years later the scars were still impressive.
Had he been wearing a cotton shirt the injuries would have been much less.
Had it been wool, maybe no injuries at all.

We could say a 12-yr old shld know better, we could say he should have been supervised more closely...
but who hasn't done something dumb as a 12-year old?

I guess my point is that if I know 3 guys who have been burned due (partly) to synthetic clothing, then the statistics must be pretty high for the general public.

Almost all my dirtbike gear is synthetic. There are 3 gallons of gasoline in the tank in front of my crotch.
We often have a little camp-fire (sometimes a BIG camp-fire)
Things that make ya say 'hmmmm...'