As for are the hours valuable-yes there is no discounting because you fly on water, if anything they are more valuable because many people in the bigger companies understand what it took to get those hours-(read other non-flying chores)-and the conditions you fly in, poor wx, strange loads etc, the decisions are all yours out here and if your still around to be looking for work on a turboprop without an accident history, then you must have done something right.
As for dangerous flying, most operators honour your decision to say no-go without question. More to the point in my experience there is no real pressure to fly when the weather is down, but perceived pressure. The young pilot wishes not to be looked upon unfavourably, and therefore pushes him/herself beyond their own predetermined limits without a word from the operator.
------------------
Life's Short...Fly Fast!