Seems reasonable enough, but you might be falling for the old fallacy that doing something is always better than doing nothing. It's an easy sales pitch but it's not actually a valid argument.

Using #DefundThePolice as an example... it seems obvious that something needs done but https://blacklivesmatter.com/defundthepolice/ doesn't make a convincing case about. There are a lot of people who are opposed to the status quo but don't see much value in that particular hashtag. Does that seem anti-BLM to you?