The 49er's circa 2012 were similar.
The fact of the matter is if you're in position and facing the play most ref groups allow contact. And it seems the further into the season the more contact is allowed. Seattle exploits this.
I recall that after the losses to SF and SEA in weeks 1 and 3 of 2012, Bennett observed with apparent frustration that our receivers needed to get more physical and into their routes on time. I don't know if there's anything else to say about it short of new directives from the league.
In any case, those two games established a template for containing Rodgers...drop 7 and disrupt timing. Of course, this requires at least a decent pass rush...at 3+ seconds Rodgers will slice and dice regardless.
To give credit where credit is due, reports indicate Sherman, et. al. are tape hounds who burn the midnight oil. One would presume they're scouting refs and not just opponents. These guys are not thugs...there is fair amount of subtlety and skill in the process. Being on the receiver, in position and facing the play is a high prerequisite bar for getting benefits of the doubt.
One can complain a little about it...more than a little is just excuses and whining. Figure out a way to beat it, starting with the fact that some of those guys can be outrun.