I think the Seahawks threw the ball to Graham more than the Packers did last year. Richard Rodgers had more opportunities a few years ago than Graham had last year. Not sure if we threw the ball close to 70% of the time or not that year either, which would make that even more significant.
Why not actually look this stuff up and cite it? It is easy to do.
Graham 2017: 16 games, 96 targets, 741 snaps, 68.4% snap count
Graham 2018: 16 games, 89 targets, 795 snaps, 75.7% snap count
Seattle used Graham somewhat less and threw to him somewhat more, but the differences are not particularly striking. In the final analysis, Seattle targetted Graham about 1 additional time over 2 games.
Richard Rodgers had 85 targets in 2015, a few less than Graham last season. His next highest number was 47 in 2016. That was the season Nelson missed with the ACL injury, Adams was gimped up for most of the season, and James Jones was fading and slow which defenses caught up with as the season wore on. There was a short pass emphasis illustrated in the target counts:
Cobb = 129 (10.5 yds. per catch)
Jones = 99
Adams = 94
Rodgers = 85
Starks + Lacy = 81
The pass play count is closely equivalent to pass attempts + sacks + QB runs.
In 2018, that total was 741. In 2015, it was 681. Graham's targets per pass play = 12.0%. Rodgers in 2015 was 12.5%.
Looking only at actual pass attempts, Graham was 89 targerts on 640 attempts = 13.9%; Rodgers in 2015 was 14.8%.
Graham and Rodgers usage in those two seasons were very close with Rodgers getting a slight edge.
Of course one key difference in those two seasons was Adams getting 169 targets in 2018. Had Nelson played in 2015 with the 151 targets he got in 2014, its fair to say Rodgers would have seen the ball less.
Rodgers relatively high target number in 2015, with no season close to it before or since, has more to do with the alternatives and playing from behind less often.