Danny,
On the other hand, scientist need to use older theories to build something new.
This is true, for the most part. However, it may also be true that there have been instances where an over-dependence of "older theories" may actually have had the effect of encapsulating the thinking of the scientist(s). In other words, perhaps this can become a kind of straight-jacket where the scientist is so busy developing his/her theory within the framework of conventional wisdom that he/she loses sight of another useful technique known as "thinking outside the box".
In the long run, break-throughs will still occur. But at the same time, being "stuck" with the "old ways of thinking" may have necessitated research down a number of false trails leading only to dead ends. New and innovative thinking might have been precisely the remedy to circumvent this, and saved a lot of time and expense.
This is one of the arguments I would have for taking the position that we need to give these so-called "fringe scientists" a chance to be heard, and to give their theories at least a fair consideration. They may serve as very good examples of "thinking outside the box" that may lead on to scientific breakthroughs. But they really do need support in order to move forward.
At the same time, I fully recognize that there are some real "kooks" out there. It is important to weed those ones out, in order to safeguard valuable time and resources. This is where I would hope that approvals for many competing projects would not be done unilaterally by single individuals in positions of influence, who may have built-in predispositions for or against. Many minds giving due consideration to a particular question or project should level the playing field, and work against the idiosyncrasies of one indidual. I am confident that this does occur in most instances.
By way example, that there are those in Cancer research who have made some "unconventional" discoveries, worthy at the very least, of some research grants or other funding to enable them to move forward with some serious research and testing. Some areas of research do have legitimate merit. Yet it may have had the door slammed in its face in terms of support. Scientists who insist on travelling down this road may also find themselves on the outside looking in, especially if they behave with anything resembling a missionary zeal. Enthusiasm can often be misinterpreted. This game is not for the faint of heart.
Again, onward and upward. (Or as my marketing friend used to say "Inward and downward!")
Rod P.