Allen,
without going into a complex chemical explenation ( shich I dont think I could do effectivly anyway) simple answer, it just works,, Lacquer is an ancient technology material, this base clear system is fairly new and as such is much more advanced.
Trust me, blush is not an issue in anyway.
You are correct however in assuming that the thinner is basically a solvent , however there are many parts to the solvent, one gets the material to the proper viscocity to leave the gun, one gets the material to flow on the surface and yet another keeps the surface open to allow the trapped solvents to escape,, it is far more "engineered" than lacquer ever thought of being,, it works,