[uoaei]

Per [1], lithium is somewhere between "too rare to consider" and 33rd in the list of elements sorted by abundance. The yield of the other quoted elements from their respective ores are magnitudes higher than that of lithium, and those ores are also important sources of other metals such as silver as byproducts of the refining process, so there is relatively much more value in exploration and mining those elements vs lithium.

Your claims of economic feasibility are still well within the range of speculation, you haven't backed up your claims with any serious evidence or analysis. Your claims of abundance are of the flavor of "wait and see how much more we find" which is speculation by definition.