Could it be that we ought to welcome new ideas--even ones that sound crazy at first--and, without too much resistance, explore and test them with an open-mind.

I think this is a great philosophy, and one that I try to follow. However, there seem to be two major stumbling blocks, examples of both of which can easily be found on a number of threads on this site.
1. The person proposing the idea takes offence when asked questions, and resorts to "ad hominem" attacks, which militate against reasonable discussion.
2. There are those who pour scorn on the proposed theory before any discussion can get under way.
There never was nothing.