Why can't we select the challenges

So This kinda bugs me about the game, ok so when the weekly challenges are available we have this huge list of challenges but we.

Have to finish one on the list to get the next one.

I would rather be able to select them and place them into my lost of 4 and just knock out some in one round.

I have seen some I could do in one round.

But I have a sneaky suspicion that it’s designed this way to lock you out of challenges and give you ones you may not want so you are motivated to go buy a challenge swap.