forgive me, it is difficult to put my thoughts into words.
when we assign people types (including ourselves), we bring expectations regarding their (our) behavior. this limits potential deviations from the patterns which may or may not really be there.
these expectations arrive in natural interaction w/o socionics, eg "fred is so sociable, josh is a recluse, she is really emotional, etc." behavioral patterns are noticed and labels are provided. it is somewhat natural. the odd thing is how in socionics the descriptions become laws. {maybe it is our western inclination to provide laws for everything} your behavior is "because of x x and x" and "because you are xxxx", while there is really no evidence that such laws exist.
when describing persons in type language we reinforce behavioral patterns by our dispositions, words, interactions and unconsciously limit potential growth.
if type is nothing but a description of patterns of behavior, why accept it as your identity? as anyones? can we participate in other patterns of behavior? i don't see why not.
we ought to be careful in stereotyping and limiting ourselves.