To complain is not to explain. To explain is to be plain; not pretentious and unaffected.

If you complain, you haven't come to this world to play.

Make every bargain clear and plain, that none may afterwards complain

Our schedule is unaffected by some of the recent changes that they've announced.

Careless she is with artful care, / Affecting to seem unaffected.

Those who take pride over their high chair position should understand that they are simply plain lucky than others and nothing else has worked in their favour.