@Rob "The environment" we exist in is one created out of whole cloth by the car industry and their marketing skeevs. The actual market for people who's use could could even approach "needing" an SUV is miniscule, even smaller than the *real* market for work trucks in the USA. In both cases, however, there is more *profit* for the car manufacturers in selling those than there is in selling affordable, appropriately-sized urban vehicles, and it's worse still for electrics because the industry are now having to fight against their own prior marketing - by working their asses off to fuel "range anxiety" in the public, they've made it almost impossible to sell small, efficient EVs because almost nobody will buy one unless it has hundreds of miles of range, even if they only actually exceed 50 or so miles of travel in a day once or twice a year, and you need a HUEG vehicle body to fit all the sodding batteries into(and then more batteries still to drag all that extra weight).
And EV's are hardly a magic bullet - they take almost as much carbon to build the vehicle itself as an ICE vehicle, and more again to mine and refine the rare minerals for the batteries. Sure they work out at about 1/3 the total carbon over their full lifespan, but that's assuming you're using green energy to charge them and that they get used for their whole lifespan - but, regardless, we don't have the carbon budget left to transition enough people over to EVs to decarbonise transport before transport carbon pushes us over the limit for 2C+ warming. Not to mention the big sodding things are even worse for particulate emissions due to their weight causing intensive brake & tyre wear, the space they take up, or the fact that being squashed by a green EV is scant consolation to the people getting squashed.
SUVs are a problem now, dealing with them can't wait another ten years while active travel and public transit initiatives make car use less necessary, and they'll continue to be an issue even after that - the only approach that has any chance of achieving results is to make owning one a legal nightmare, which first requires people support that, which first requires people know about the problem. Tyre Extinguishers have brought a bigger spotlight on the issue in a couple of months than a decade of Nice Guy Activism, and while their approach will inevitably calcify some people's attitudes what's the alternative? All that can be done is to bring enough attention to the issue and hope either enough people stop being selfish of their own accord, or that like with smoking indoors and drink driving, their selfishness becomes something society shames them for and drive change that way.