the harness on this particular aircraft could not currently be fitted with a water-activated quick-release mechanism which would be required if a pilot became incapacitated in a sea survival situation.
Perhaps the problem lies in using the aircraft in a place that freezes your knuts off. Other users live in more sensible climates.
But I think it is taking a rather extreme view in wanting this water-activated quick- release buckle. What happens when some student barfs on it? Or spills his inflight coffee?