You both are completely ignoring the fact that first world countries use far more resources than third world. The fact that the planet is currently supporting 7.5B when 6B of them are third world does not all mean that we could could support 8+B with first world levels of QoL. Cherry picking energy usage from a country with the most mild climate in the world and countries with little agriculture is also highly optimistic (and even when you do, the numbers are still a couple of orders of magnitude higher than third world).
Fisheries are a good example. Fisheries are currently in significant decline due to over fishing, pollution, climate change and human built infrastructure. All of these things will get worse as the world moves closer to the first world. Massive desalination needed for agriculture would likely further harm ocean life.
It is also complete fantasy to believe that 100% of metal can recycled, unless you live in a world where money is irrelevant. Never mind plastics, composites, etc. Saying we only have a 60 year supply of iron ore with only a 2% yoy growth rate should be your wake up call. The yoy growth rate will be much higher than 2% if we are moving people up to first world status and when iron runs out, so will first world QoL.
But we are currently living through a mass extinction, most of the materials we need for our current way of life will be economically out of reach within 100 years, we are already destroying the climate and oceans, etc. All of these things are rapidly accelerating too, btw. But lets completely ignore all that, because we can just wish that it isn't all true and that tomorrow will be a utopia with everyone living at first world standards and an effectively infinite supply of materials due to technology (and humans effectively managing them).
The world needs massive population control (preferably on the birth side) and plans to handle resources better and more efficiently. In reality we will speed to the cliff, and then just fall off of it because people are in denial, either because they don't believe in science because of a religious god, because they don't believe in science because of a technology god, because they don't want the fall out of making hard decisions today, or just straight ignorance/denial.