I'll queue for whatever I like and if I want to cheese the ilevel I will. Sorry if it doesn't meet with your approval. They need to adjust the experience for the duty based on the content. 50 level raids, 60 level raids and 70 level raids should not get the same experience. They do that with Main story with Praetorium and Castrum. Interesting to see people leave when they get Castrum cause they prefer the longer duty.
Also interesting to see how many people run Main when here on this forum the going banter was no one would ever run it with unskippable cutscenes.
Make it worth the time and people will want the higher level duties.