I wouldn't call it nuttery, and I vehemently disagree with many of those analogies. Whereas religion yields no tangible product, scientific investigation and thought leads to inspired, clever, and useful technologies. Do you think DaVinci's ideas on flight were an endeavor in nuttery as well? If you argue in the affirmative then I would be quite surprised at such lack of foresight. That we are capable of speculating (in quite an educated manner) so far into the future is a testament to human ingenuity.