Outside of pre this season New England and maybe Philly and the Ravens, how many teams really have deep TE depth? If Jason Witten, Kyle Rudolph, or Tony Gonzalez go down, the next guy up is not going to be able to do anywhere near what the injured starter could do. There are only a handful of teams that have two TE's close to the same talent level.
Any time we have a depth discussion, it sometimes feels like people think we should have 3 all pros at every position.