I tend to agree. Unless you're a Calvin Johnson/Julio Jones/AJ Greene/Ja'Marr Chase type WR, you're replaceable. Singleton is good to very good, but he's not on the irreplaceable tier. Every WR that has portal'ed out of GT the past few seasons was quickly replaced by the next man up. Give me a very good OL and an elite QB, which I think GT will have both of, and we'll be more than fine.
Just an FYI, Malik Rutherford was actually our leading WR in terms of catches, had the same amount of receiving TDs, and 84 yards less in receiving yardage. This offense will, especially with a healthy QB situation, will create productive WRs.