Well no, because the answer could easily be both... Efteling 20/30 even 40 years ago is different to now, doubt even that long ago they'd know the levels of expansion and crowds...
These aren't NIMBYs; but I would certainly have equal levels of concern to my area if I lived right by a 365 day a year theme park... The park has a duty of care to balance expansion and minimise effect on local everything...