... which just means you have to get creative.
Freeway blocking is not creative, doesn't get people present on your side (quite literally the opposite), presents safety risks, may delay emergency vehicles, wastes natural resources, and doesn't change minds of readers. Same with the stupid "throw soup / oil at a piece of art" shit I saw repeatedly. A throw-away headline seems to be the goal, but it accomplishes next to nothing.
Target. Those. In. Power. Make life fucking hard for them.
This thread (not you explicitly) reeks of this attitude I see frequently on Lemmy of "It's a deeply stupid and astoundingly flawed thing to do, but I'll defend it to the death because it agrees with my politics!"
In this one instance they might do that. In the area where I live where it was done, there was no space for the emergency vehicles to go in the other direction. Just because there are ways they could do it in this one case doesn't make it universal.
Also, are you able to provide the polling you referenced showing that highway blockades change minds? I was unable to find anything other than web and call-in polls, both of which overwhelmingly showed the exact opposite (but those are hardly scientific so I wouldn't trust them).
Also, I'm not the one downvoting you. I do not do that.