The Agorist perspective does not only see the world in personal one to one relationships. It promotes the market permeating all aspects of society, some of which we may personally dislike or not approve of (or find nauseating). It appears to me to encapsulate the quite common sense idea that what people say (in forums/public etc.) and how they actually spend in free exchange can be quite different and that the market, society wide, will come to reflect who we really are as humans (personally chosen compromise, exploitation and all) rather than some moralist's (or intellectual's) ideal that is imposed (ultimately via the initiation of physical violence).
There is nothing (in Agorism, at least) to stop you reflecting your concerns regarding "the quantification of everything, the atomization, the abstractions, the reductionism" in your market choices and personal interactions. Many may well agree with you and exchange accordingly.
Bringing this simple logic into the 'real world' is not at all a presumption of the status quo. It would involve a revolutionary change in thinking. Far from what we currently have with every individual encouraged to be a petite moralist imposing his/her ideas on the rest of the world via 'democracy'.
We are all limited in that we can only personally interact generally in one-to-one situations (like an exchange) at any one time. Viewing situations that we may find ourselves in, through that lens, can often help to reflect the broader agorist perspective in my experience. Very often what makes sense to the individual makes sense for the broader society despite all the politicians pleas that we should abandon our individuality to the 'common good'.