It doesn't mean that the source of this ultimately deeply destructive ideology isn't the political right.
Scale and logistics are good. I think they should be managed by federation (and through regulation), but I'm sick of having bosses who see my salary (rationally) as something directly coming out of their bank account. I prefer a little indirection and mediation in the relationship.
Efficiency is good for everyone. The more time and effort you save, the more time and effort you have to waste. There are scales that are ideal for particular businesses, and that scale doesn't always coincidentally coincide with the scale a small-business owner can handle. Business should be as big as real (not paper or regulatory) efficiencies can be found at, and against those efficiencies we should maximize the flexibility and ability to innovate of individual businesses and workers.
Instead we just subsidize the biggest businesses most, and through legislation create false efficiencies to subsidize them even more (and guard them from any externalities.)
Maximizing for efficiency is not. It leads to a variety of problems, including (but not limited to) a strong tendency toward consolidation of power in too few hands (thus leading to abuses), and fragile systems that break down when a shock comes (like we saw with the supply chain issues during the height of COVID lockdowns).
The US has been turning away from free markets for at least a century now.