The trend is multiple guys contributing. Your own "benchmark" (which I don't really agree with) was SB winners.
Not many of these guys got over 1,200 yards the year their team won.
2006 the Colts had Wayne and Harrison both over 1300 yards.
2007 the Giants had Buress just barely break 1000 with 1,025
2008 the Steelers had Ward just break 1,000 yards with 1,043 (15th in the NFL)
2009 the Saints had Colston just break 1,000 yards with 1,074 (18th in the NFL)
2010 the Packers had Jennings cop 1,265 (4th in the NFL)
2011 the Giants had Nicks get 1,192 (12th in the NFL)
2012 the Ravens didn't have anyone on the roster with over 1,000 yards receiving
2013 the Seahawks didn't have anyone on the roster with over 1,000 yards receiving
2014 the Patriots had no WR's with over 1,000 yards but Gronkowski the TE had 1,124. (WR Edelman was 25th in the NFL)
2015 the Broncos had Thomas go for 1,304 and Sanders got 1,135 (7th and 15th in the NFL)
I wonder how many of those guys were in the top 15 in receptions.........
See a trend there or do I need to use crayons?
I'll simplify it. Look at the QB's for the answer.
Do you see many "household names" or potential HOF players or guys who have been to multiple Pro Bowls at the WR spot? Yes we see a few.
At QB?
PManning. Brady. Rodgers. Brees. Russell. Roethlisberger. Flacco. EManning. That is all the guys who got rings in your selected 10 years.
A lot more PB's among the QB's and the WR's get a lot more roster spots as we know. See anyone that won't get into the HOF? I will say Flacco and possibly Russell. The rest will be in.
It's the QB and has been for a long time. Not a "true #1" WR.
The QB and a group of weapons to deploy. The #1 WR is not in fashion right now. Maybe, like clothes, it'll cycle back in but it's been out of fashion and will be for the foreseeable future.
Thanks and enjoy your day.