Absolutely, but it's also important that reactions be proportionate and for that matter fair - is there a reason for aviation to be treated differently from motoring in this respect (e.g. the lead in the fuel and the fact that an aircraft accident is more likely than a car accident to involve food crops).
I'm neither a toxicologist or a water engineer either, so I'm not qualified to comment. However, I believe that Holland draws much of its water supply from ground water, whereas in other parts of the world (e.g. Wales) it's more likely to come from rivers.
Not really arguing with you - just curious.