OK here we go. Let's go through the arguments.
The biggest one which pervades the article is that for degrowth to matter the politicians have to buy into it. No. The fun thing about degrowth is that a degrowther can just sit there and it works. Are you "underemployed" and happy? You're degrowing. Are you living in a tiny house with a little garden and happy? You're degrowing. Are you skipping out on buying expensive shit like a car? You're degrowing. Are you not having a bunch of children? You're degrowing. Are you using informal economies? You're degrowing.
This causes zero problems for the degrowther but causes massive problems for the ruling class. They will say "how do I force these people to work and buy useless crap and to reproduce so I can continue to exploit them?" Good. We as degrowthers just have to figure out how to stop them. We just become a dwindling tax base and start to solve problems ourselves. Yeah losing healthcare sucks but even if we hustled we probably would have lost it anyway.
The second big argument is the implication (no suggestions are given) that if we somehow "rebranded" degrowth into something sexier and palatable, it would be taken more seriously. I doubt it. If you called it "rewilding" it would get basically immediately re-interpreted to mean "rewilding the economy" along with a bunch of deregulation to allow for clear-cutting forests or whatever.
We're not trying to "brand" this to be friends with the political class. This is meant to be a threat. For us, it means enjoying the breeze and drinking some water. For the ruling class, it means having to jump through hoops to figure out how they can keep their private islands.
The third big argument is that the world's poorest need to "degrow". No. Regular growth is fine for them. The west needs to degrow far enough to make up the difference. Far from the "economic wisdom" of the nineties, it's now extremely clear that the global south can just leapfrog the emitting technologies straight into clean technology. Clean tech which both by necessity and by technology is decentralised. Don't have a robust power grid? You and your community can buy solar panels. Going from no electricity to intermittent electricity is still a boon. Society will adjust appropriately to the point where a "reliable" won't be worth the cost.
Literally the most damage the "growth" crowd can do to the degrowth community is to continue the politics of envy. Try and convince the global south that they should buy an ICE car, not because it's better, but because it shows domination and superiority. A degrowther must counter that by living a good life. A glass of water, a cool breeze, and a smile, and the other guy looks pretty silly with their Ferrari.