Being preemptive is often a method of deflecting valid and warranted criticism
So warranted, in fact, the speaker recognizes the weaker point of his own statement and attempts to address it before anyone else has gotten a word in.
No need to... "Not to be racist but..." , "Not to be rude but...", "Not to exaggerate but...", etc.
Just say your statement and get dragged for being racist, rude, exaggerating, etc.
