Smooth seems to imply that all of civilization needs to be vertically integrated for maximum efficiency, and it doesn't matter if all the oceans are empty, food is entirely synthetic in a complex chain of labor custody, and every inch of land is covered with concrete.
I never implied it does't matter. If you want to be able to go back to the land, then it certainly does matter. Very few people will ever want to do that, but very few is not none. I just said that you can't argue starvation and population reduction at the same time that you argue for widely-available synthetic food. Being more tightly integrated into society is another matter, and technology does tend to do that, with some exceptions.
Anyway, I'd suggest that technology makes it less likely (similar to TPTB's comments about less farm land being used). Synthetic fish will reduce demand for real fish, because it will be cheaper to grow fish meat in a vat using genetically engineered yeast or whatever (I have no idea how synthetic fish works). Real fish will become a luxury good that are sold in smaller quantities and higher prices (the latter including people who choose to devote large quantities of their scarce labor to catching it in a self-sufficient manner, via the "opt out" luxury good channel).