[cauch]

I don't think you have demonstrated "an infinite expansion of the economy is fundamentally not contradictory to finite planetary boundaries", you've just shown that SOME growth is possible without using resources.

In fact, you mention yourself the reason why growth is somehow in contradiction with the finite planetary boundaries: you say that if the carpenters do 1 boat instead of 100 chairs, they will create growth because the value of the boat is bigger than the value of the 100 chairs. So, you acknowledge that growth is led by "the more valuable thing to do, the more profitable". The problem is that, by construction, exploiting resources are way more profitable than not. For creating a boat, it's way easier to chop trees to get new 2x4s than to disassemble chairs (if it was the case, recycling would be the go-to process, and it is clearly not the case in reality. on top of that, some fabrication processes are not recyclable).

So, yeah, technically, we still can have some local growth after all resources are consumed (by just disassembling chairs to create boats), but in practice, this local growth is compensated by the negative growth of losing the big gain of consuming the resource.