Just as, mediocre generals always want to re-fight the last war, mediocre rebels always want to re-break the last broken taboos, to re-transgress erased boundaries and to imitate originality.
The truly forbidden is, as it always is, beyond the pale, shameful, anxious and doubtful. Rebellion is solely for the most hubristic who do not feel the reality of others enough and least hubristic who perhaps feel the reality of others too much and find themselves compelled to resist present norms. (As Nietzsche demonstrated, it is hard to tell the difference from appearances alone.)
People who expect applause or head-pats from doting authorities or dittos/metoos from peers or acclamations of bravery will rule out precisely what they pretend to be all about. They don’t want the reality of rebellion which comes only in its afterlife, but they want it right now, in advance, and indeed they get their reward, to put it in Christianese.
The real question might be: is rebellion all it’s cracked up to be? Why do we admire past rebels while scorning present ones? Maybe past rebels are just folks who won and wrote histories of glorious rebellions led by courageous rebels.