That may or may not be the case now, but it certainly isn't true historically. There's a reason why "What do we want? Something! When do we want it? Now!" is a protest cliche.
Grassroots activism used to be better organised. Trade unions and other working-class organisations provided structure and institutional expertise. Discontent could be directed as part of a broader strategic campaign. The atomization of society has diminished the influence of these organisations. Most activism today is disorganised and strategically inept, simply because the instigators are inexperienced and lack the support of a wider network.