Perhaps that went over your head. The point is that Ertz primary appeal at this point in his career is his “big name”. He was absolutely horrible last year and his name won’t help him in 2021. Is a bounce back to above average possible? Sure. So is a leap forward from the younger, stronger, hungrier guys we already have. Tony Gonzalez still has a big name but would be no help to the Bills in 2021. Ertz wouldn’t be either IMO.
As for “we don’t know what is happening right now”, that is true but it is clear that there isn’t some sort of bidding war for Ertz. Why might that be?
Beane has managed the roster and cap in a highly efficient manner and has some big contracts to core guys coming up. Throwing draft picks and big money at a washed up tight end does not align with really anything else he’s done since he got here.