In a slightly different twist, I once heard it said that the Mishnah Brura was written for Baalei Tshuva and geirim. What this means is, that a minhag (obviously with a solid mesorah) overrules the halocho. Someone who doesn’t have a mesorah to act according to a particular minhag will follow the halocho as paskened in mishna brura.
Please forgive me if that sounds offensive to anyone. The intention is as an anecdote by way of explaining a concept.