im not sure you are understanding what the rules or point of the events are. therefore there really is no point in continuing this argument. the point of the skills challenge is to find out who can complete challenges fastest. so my argument is that they should "complete" the challenge before they move on. that is totally different from the 3 point contest. its apples to oranges. the point of the 3 point contest is to see who can make more 3 point shots, not a challenge where you advance after you make a 3 from one spot. it is consistent. you get 5 shots from 5 spots. why would they make someone stay at the spot til he makes it? to even make that argument for your side isnt even logical.
To me what they should do is keep an actual timer and impose a small penalty if the pass is not completed. This is because if a player misses the first two passes, then there is no benefit in making the third and he doesnt need to bother trying to make it. He is no worse off than a player who missed the first two but makes the third. Best of both worlds. Alternative would be to increase it from 3 to 5 to increase the penalty a little more since it's the only pass and as some have rightly said, should be completed as part of the skills challenge.