Greater Aircraft Variety in the Weekly Challenge

In the latest weekly challenge two of the three the aircraft chosen were the same - a Hornet jet fighter. Now that’s great for the top guns, of which I am not one. But surely there should be a greater variety of planes used in the weekly challenge to make it fair. I have noticed that for the last four weeks the low level challenge was the same plane - again the hornet fighter. Why is this?

I am a reasonably competent flyer having got the platinum level, but if every week one of the planes in the weekly challenge is always going to be a hornet I’ll probably give it away as I don’t really enjoy flying it.