At grassroots I agree. But further up the pyramid, for right or wrong, there is a greater expectation on "Event Management." Once you get to supply league and above, people are paying to come and watch a game of football and in many cases the players are also being paid as well therefore the teaching to referees changes somewhat.
In my years of Refereeing, I've been fortunate to attend many RA and CFA events with different speakers from the top of the pyramid down. The question that always get asked is "You guys make our job harder by not clamping down on dissent and OFFINABUS, why don't you?" And the answer is always the same which is "Because it's made clear to us that the attraction of football is in the players, not the referees, therefore cheap cards for this is not something the league or clubs want to see, especially if it means a star player getting a ban"
A ref in the Premier League that treats dissent in the same way we would at grassroots is one that would soon find themselves not being appointed to those games.
Whether we agree or disagree with it, that's the way it is, for those who go up the pyramid as Referees they either need to adapt or stagnate in their approach, for those who won't ascend then just use the tools at your disposal.