I have no quarrel with the cynicism of that post, but I do decry the defeatism of it.
If we were all to despair of justice by reason of manifold injustices, the judiciary would never change for the better – and for all the current failures, the present day system is so far improved upon the situation even of a century ago that it is all but unrecognisable.
In great part, that is down to those who have entered the arena and played by the rules in defiant challenge to then current injustices and [largely by reason of publicity] have succeeded in gradually forcing greater public accountability and ethical standing.
Besides: regardless of potential success or failure when challenging governmental corruption, it is personally better to fight and lose than to roll over and lose – if win they must, let them know they must still fight for it.
All the above supposing that your cause is worth it of course.