Success of protests and grassroots movements does not scale with harm/annoyance to society. If that were true you'd just have to be as annoying and hostile as possible to win, which would have been sussed out a long time ago.

The predictor is public moral sentiment, and maximizing exposure to an issue people would be sympathetic to.

Blocking traffic "for climate awareness" does not engender sympathy. People think themselves "aware" that climate is an issue, but aren't on board with perverse degrowth solutions.