That's an opinion. Durham Smythe was the #6 TE per 247.
It's an insurance policy whether you think so or not. If they aren't getting significant clock, why burn the year? If they both don't take Weishar's snaps, why burn it?
If they both pass Weishar and you burn both years, then play the sh!t out of them and get them ready for '18 because if Weishar is #3 on the depth chart, good chance he heads off on a GT. Smythe gone and Alize could go to the NFL and that leaves you with Kmet, Wright, and true freshmen Takacs and Tremble (assuming). Now you are thin and vulnerable to injury because you didn't handle Weishar correctly.