The alternative is what? Contract GDP in every nation until carbon emissions are below target? You think people will allow you to go through something larger a great depression in order to meet climate targets? Did you not see the shitshow that happened in Chile and France when those governments tried to hike gasoline taxes by a small amount?
There is very little we can do over the next few decades to curb emissions. Solar and wind are not viable replacements for coal and natural gas (and are disastrous for the environment due to the requirement for exotic minerals and land-use requirements). Nuclear power is, but the environmental movement is actively blocking re-investment, and we're so far behind that it would take decades to jump-start the industry. Outside of energy generation, freight (sea and air), as well as air travel have no obvious non-fossil fuel alternatives. There are also thousands of petroleum products that don't have obvious alternatives either.
OK... so let's act. What do you do?