i am.
there are manufacturers out there selling 'hunting' clothing that is no more breathable than the £20 waterproofs you see at your local agricultural shop. by its very definition a 'hunting' jacket has to be able to cope with what happens when its wearer goes hunting - we move around, we generate heat, we might be carrying a daysack.
if we accept that clothing shouldn't have to cope with that because its our fault that we move around, then we should stop paying £300 for a jacket and stick to the £20 pak-a-mac instead, as they perform in the same way.
like you, i'm an old fat sweaty ******* who used to be a racing snake - 300 miles a week on the pushbike, and i could walk 60 miles a day with a big rucksack and do it every day for a week when i was 25 - but that does not change the fact that we shouldn't be able to, having paid hundreds of pounds for a jacket that claimed it could, walk for an hour in gentle but persistant rain at 3c without our clothes being wringing wet with sweat.