How do we recognize faces?
Not by analyzing them, certainly not. We don't make an Excel file of proportions, coloring, distances that we ponder over in our free time, trying to memorize the data.
Instead, we form a gestalt of the overall pattern without being conscious of how we do that.
Humans learn complex things-- faces, chess, dance, sports and so forth--using pattern recognition.
And language falls into this camp too.
When you break a language up into its basics to study them one by one, you destroy any relationship between its elements. You destroy the pattern.
So acquire language in large lumps.