1. So in the beginning there were people. And those people had problems (need for food, shelter,…).
2. So to fix these problems more efficiently (but far from completely), people invented economies.
3. But now these economies require infinite population growth (i doubt that’s actually true).
4. Therefore people make more people to sustain the economy. These new people themselves have needs, which did not exist before.
5. So these new people now also need to make even more people to sustain the economy.
6. Repeat.

So the economy actually amplifies suffering (exponentially), not reduce it.

Also, like others have pointed out: Many economies before industrial agriculture had basically 0 growth, and sustained themselves for centuries.

Idk about Just Stop Oil, but as a someone from Germany, a country that has done what you seek to do, namely moving from 3rd world conditions to 1st world conditions by the use of the cheapest energy source: fossil fuels, there is a sad secret i can tell you:
As per my quick and unscientific calcualtions, Germany used fossil fuels over a period of roughly 120 years to bring ~80M people from 3rd world conditions to the current level, emitting roughly 80bn tonnes of co2 and heating the planet by 0.145C.

If we apply this very rough calculation to 1bn Indians (blissfuilly ignoring the rising population of India), Indians will have to work tirelessly for the next 50 years at 2x our speed to do this. So most indians living today will likely never see that dream fully come true.
As a result earth will be heated to 2.95°C (current temp + heating by Indians), a temperature incompatible with boring 3rd world stuff like farming. If we add the african continent (>1.2bn) to the mix (they also want to achieve this, i asked them), it’s more like 5°C.

In the end, Indians will have to decide: Do you guys want to want to have your grand-children drive cars, or do you want that your children have stuff to eat.

Here in Germany the people have already decided: We want to achieve a ratio of peope-to-cars of 1:1 (as God planned for us) (We are at 0.583:1), and for that we are sacrificing our grandchildren’s cravings for food (and your grandchildren’s too). But that is ok, because they are not born yet, so we can not hurt them. And also: Food is so boring.
If we fail, and someone forces us to abandon our ways and do koombayah without cars and with renewables (idk that’s Indian i think), we will just say we did not know that co2 was harmful and that we just did what our boss ordered. Worked for our grandparents, will work for us.

I already know what Indians will decide, for they are just like us: You will choose the cars.

Peace to India, and remember: We are the good guys, we knew nothing, we just wanted to be happy (life is not worth living without a car).

May contain large amounts of sarcasm, sry for bad english, i’m in a hurry.