Source for thinking the degrowth crowd thinks this: Introduction to “The Future is Degrowth”. Does the degrowth crowd really think they can get rid of capitalism without any violence? This seems to have the opposite of a historical precedent, and is a deviation in Marxism, which they seem to heavily draw from. Anytime revolutionaries took the peaceful road they got outcompeted at best and massacred at worst.
Regular degrowthers are liberals so yeah they are idealistic.
What grinds my gears is that they try to force us global south nations to also abandon fossil fuels while they conveniently make profit off selling the green energy infrastructure to us. Fuck em there can not be degrowth without a extractivist phase, they are the ones that should take that burden first not us and not only that but to also pay off their climate debt to us.