Microcenter has a total of 29 stores across the US. Yankee Candle has almost 10x as many locations (240).
Yes, Microcenter "exists", but primarily through selective cultivation of their locations. From a pure market footprint perspective, they are outclassed by a candle company, and many other niche businesses.
At no point was I entirely denying that some people go to physical stores to buy components. I was just countering the idea that a majority of people do so, as opposed to ordering online.
That MicroCenter continues to exist tells me that there's at least enough people shopping for parts in meatspace that there's net revenue to be had.