Hordes of new people will demean the integrity of storm chasing. This is fear and jealousy talking. Some are afraid they will lose something if more people get involved in the hunt. They want to keep chasing all to themselves. Well, new blood is not to be feared, especially if it brings in talent and recognition.
More recognition can mean more funding for the scientific side of things.
And more money never hurt anyone. Most newcomers don't know how to chase safely. This is probably true, but the best way to teach them is not by discouraging them, but by inviting them to join experienced veterans and learn the correct methods to follow. Encourage them to take classes on storm spotting and weather. Teach them to be aware of what's going on around them, especially traffic and road hazards.