that Linebacker is locked in on the guy about to curl up in front of him and is parallel to the TE, 5 yards away, and facing the opposite direction the TE is running. He has basically no idea that the TE is even breaking open behind him. TE at this point is running full speed on the slant/post
With a properly thrown ball up the seam or toward the post--there is absolutely zero chance that LB who is standing still in the middle of the field is going to be able to pivot, make up the ground between him and the TE, and intercept (or even break up) that pass.
Zero chance. Pick the best MLB in the history of football. Any name you want, in the history of the NFL, and put him in that spot right there standing still in the middle of the screen with a TE already running full speed 5 yards away behind your back.
If Dak rips that ball right now (in that still shot) to the proper location with the proper touch on it--there is zero chance that's anything but a walk in TD. Zero.
It's ok to admit #4 missed an opportunity. it doesn't make you a bad fan. You can still wear your "This girl loves Dak" t shirt with pride.