OK, I don't agree though. Rookie WRs don't struggle to acclimate in this league. Especially first rounders. Many jump into prominent roles in their offense almost immediately. Last four years:
2022: two rookie WRs over 1K yards (Wilson and Olave). Four had over 800 yards.
2021: two rookie WRs over 1K yards (Chase and Waddle). Devonta Smith was over 900 yards.
2020: one rookie WR over 1K yards (Jefferson). Three had over 850 yards.
2019: one rookie WR over 1K yards (Brown). Three had over 900 yards, Four had over 800 yards.
So I mean in the modern NFL, you can pretty much pencil in two rookie WRs getting 1K yards, and roughly 3-4 will eclipse 800+ yards. And the gap between an 800 yard WR and a 1K yard WR isn't big.