Somewhere the manager/funder needs to make a weighed decision on which risks to take and which to spend time and money on investigating. Unfortunately, on the Challenger, he made the wrong call. Fortunately, on the millions of other projects that do succeed, the right calls are made.
I reckon in every launch there will be some crack head who says this is too dangerous or has fundamental flaws. Excluding the mother and/or wife of the explorer. Afterwards these crack heads only get attention if they are right.
If I predict disaster on every launch for this or that reason and post it on youtube (and delete the video it if there is no disaster), I might become famous on the one time that disaster strikes.