Indeed, but if you want approval for a third runway the threat of night operations as the alternative would change the attitude of many of the local objectors.
A referendum with these two options would have interesting results.
OTOH, a third runway is only a short term fix at best. AMS has seven and has capacity issues handling less traffic. The real problem is ATC and crowded airspace, the best solution is a new build at least 30 miles out of town.