Yes, you need to fill it out. I don't know if they see it when they scan my passport or not but they haven't asked to see it on my phone when I came and then went to Vietnam for 1 week. They send many people away once they get to the front to go fill it out.
Life is a revolving door of disappointments. We must all try to be as positive as we can with whatever comes our way. Whether we are angry or not, we still have to deal with the issue at hand. Good luck.