No, you're missing the point. No one has said we should have traded for Diggs. Several have poked holes in the sus idea a veteran WR would somehow mean Michael Wilson can't get better.
No, nobody has said it outright. You've just hinting at it enough without committing.
And yes, obviously putting a vet in front of Wilson limits his 1st team reps with Kyler and gives him less game snaps. Which in turn restricts his progress.
It's a dumb idea. Wilson has more than shown he has the ability to be a WR2, and any backup to him will be back up quality like Moore or Pascal.
I don't remember anyone in 2019 saying we should bring in a guy to compete with Christian Kirk, and he had similar stats to Wilson. In fact, here's you in 2019 calling Kirk a solid #2 after a season where he had 590 yards (missed 3 games injured) and at this point had 610 yards (finished with 709, missed 3 games injured)
Kirk--solid #2 with good QB play and good talent/coaching around him.
So why is Wilson not WR2 material when he finished with a practically identical rookie season to Kirk? Is the bar for "solid WR2" a mediocre 2nd season?
He finished the year with 95 yards against the Seahawks with Brown out where he was de facto WR1. He went up against their best CBs and still gave us WR1 numbers. What more does he need to do?