Well yeah, obviously _infinite_ growth is not possible given the laws of physics.

But the whole premise of technology is that you can break the zero-sum and reach arbitrarily high levels.

For example Deuterium–tritium fusion runs on hydrogen that's pretty common to find. Yes, if we learn to exploit it, we will one day run out, but by then we'll have new sources of fuel. Similarly solar energy is just 'free' energy that rains down on our planet.

We could use that energy to farm fish or cultivate natural populations. We don't do that which is bad, but it's not some impossibility.