God commands people to do things that they can't do precisely so they will realize they can't do it.
Matthew 5:48 Be ye therefore perfect, even as your Father which is in heaven is perfect.
That would take a lot of effort trying to be perfect, right? And in the end, or within seconds depending on how hard you try, you would find out you are unable. Now what? You can't do what God has commanded. Do you just quit? Do you say "Oh well, I guess I'm not one of the elect, I'm just a vessel made for destruction". Or do you come to Christ and start asking for help.
If your 'choice' was the second one then you are of the elect. Do you know why?
John 6:44 No man can come to me, except the Father which hath sent me draw him: and I will raise him up at the last day.
Wouldn't you want to evangelize even more if you knew that you could make an impact for Gods Kingdom? Or would you rather that He just uses someone else?
If the Atonement is for everyone then everyone is saved. No one has anything to worry about. There won't even be any judgement. Because the Atonement has taken care of it for everyone. Even unbelievers and those that deny Christ.
They are totally depraved. Grace is only irresistable for the elect.
John 10:27-29
27 My sheep hear my voice, and I know them, and they follow me:
28 And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand.
29 My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father's hand.