A waste of time – said about another field but applies to allergy research as well (when reading the review request of “Allergy” today)
It’s a problem in science in general. Scientists need to be published which means they need to work on things that their peers are extremely familiar with and can recognize an advance in that area. So, that means that they all need to work on the same thing. The thing they work on… there’s nothing to encourage them to work on things that are practically useful so you get just a whole lot of research which is minor advances and stuff that’s been very highly studied and has no significant practical impact.