Compared to other top level receivers, there isn't a huge difference. This notion that he disappears is overblown in general.
All receivers have a harder time on the road.
All receivers struggle when playing injured.
All receivers have a harder time with higher level secondaries.
The conversations that were had were cherry picked to make it appear Cooper is some couch potato. Yet his teammates, coaches and opposing players all suggest a different story.
Most just look at the yards received and that paints the picture instead of factoring in injuries, location, caliber of the secondary, other WRs on the roster sharing catches.
Having two high level WRs produce over 1,000 yards in a season is a sweet problem to have.