The solution to concentrated market power is not to abandon the productivity gains, but to use law and regulate to de-concentrate market power. We could instead ban specialization and the productivity it brings, but that's dealing with the wrong thing.
> concentration of genomics
Again, solved not by banning specialization, but rather through diversification of the market. Which also helps the market be less concentrated, and further improves productivity. "Free" markets used to mean those that were unconcentrated and allowed easy entry and competition, but rally bad market-fundamentalism ideology has twisted the meaning, and invited reactionary thinking that "markets in general are bad," which is just as wrong as the market fundamentalist approach of "markets must always be used and always are right." Markets are merely a tool that can be used for good or for bad by societies, and markets are socially constructed by law and tradition, both of which are changeable, as is other parts of society.
> pesticides
This has nothing to do with advancing knowledge and specialization, and in fact reducing pesticide usage is only going to be enabled through greater advancement of our ag tech.
> food waste,
This is a rounding error in comparison to the increase in ag productivity that we have created. Also, if you have some magical way of doing this, I'm all ears, it would be great, but wishful thinking is no substitute for actual on the ground solutions that are working.