I think teaching people how protests work is pretty important praxis and is not talked about nearly enough.
Moderates and liberals tend to think of protest and demonstration as the same thing and anything that is not a demonstration is generally though of as bad or counterproductive.
Most of the populace simply doesn't understand that blocking roads or getting arrested have strategic value. They consider the goal of every protest to be to raise awareness and support and to convince people like them ™️ that any given cause is worth supporting and that their support is all it really takes to a make change happen. It's a very self-centered view of how political movement work and it seems unfortunately quite obiquitous.
They see a road block and think "that just makes you look bad" and the thought process ends there because now your movement isn't worth supporting in their eyes. If you try to explain that blocking off roads is often done to cut off supply lines to financial districts or big corporations and put economic pressure on them or the politicians they donate to, they refuse to engage with the idea entirely or claim that it doesn't actually work and the only way to protest successfully is to win over people like them even though they've probably never been to a demonstration, let alone a direct action event and if they did they'd probably do more harm than good given how ignorant they are on the subject.
We really need to educate people about protesting tactics, how they work, what they actually seek to achieve, and how different methods put pressure on different areas to get different effects and I think you probably can't teach this to older generations but younger generations are capable of learning and we really need them to learn this.
Teaching people to think in terms of systems and take a structural approach when trying to change a system is paramount because, in the current state of things, the common belief seems to be if enough people wave signs from the sidewalk, things magically work out in the end.
Why is the only possibility for you to either get on the roads or do nothing? The criticism is that road blocking is an ineffective form of protest, not that protest as a whole is stupid.
I work in IoT by the way, and I'm directly involved in programming small computers that increase fuel efficiency in heaters. In other words, if climate change is your primary concern, you shouldn't be inconveniencing people indiscriminately, because there's risk of stopping someone like me who's actually doing something that addresses the problem in a productive way.
I'm hardly close to the most important job that you'd be inconveniencing, just the most ironic one. These protests are certainly inconveniencing nurses on their way to their patients, lawyers on their way to their clients, families coming home to meet up for the first time since Christmas. Not to mention emergency workers being held up during active emergencies. This has all happened, and it's happened way more than any goals achieved by the protests.
So no, we're not all talk. I think most of us here giving pushback are all trying to better the world in our own way, and these protests are a consistent impediment to that, across the board. In fact, I would say anybody who bothers to take the time to say how stupid they think these protests are are doing infinitely more good than road blocking protestors, simply by virtue of maybe getting someone to stop that stupid shit.