I think part of the reason these sort of antics are needed is because people just forget after a few days or it becomes a bit of a virtue-signalling thing, so nothing actually gets done. Climate change is a great example of this because… well, if governments and large companies had more pressure for the public we would see change. Insulate Britain is just trying to raise awareness for an issue no one cares about unless they expeirence it, in which case it’s very localised and easy to ignore
The performative stuns are annoying and a huge inconvenience but that’s sort of the point. They get media attention, mentioned in Parliament in some manner and more people may read up on the issue
However, the problem comes when people don’t want to do anything and play into the politician’s hands with their anger. So the issue is ignored again and everyone moves on, protests continue
That does seem to mean that these protests probably won’t achieve anything sadly but I don’t think you can really blame passionate people for trying
Also this seems like an awful climate for protests tbh. The media aren’t going to focus on them when they could continue talking about all these shortages