Why syntax over morphology

Over the years of teaching and writing I have noticed how much more emphasis had been given to words (morphology) over sentences (syntax). Perhaps it is because sentences are mistakenly thought of as so much harder to pin down. When people see a sentence of twenty words they think of twenty things. Rarely do they think of the sentence as one thing. In my opinion, a sentence is a unit of complete communication. It is not the only unit to be considered complete. Words, of course, are considered (and taught as) complete units. Fair enough. We can use words out of sentence-context and still get some kind of meaning across, but just not very well. But because of the inaccuracy, it seems logical to work with the unit which best gives a “complete” meaning, instead of working with units which do not make a unit of communication. It is for this reason that I believe that syntax should be given priority in teaching and learning.