We must first distinguish between “blame” and a rational analysis of causality. Once you’ve done that, if you hear someone use blame as the rational analysis, you’re listening to someone who has given up power; the power to change, make a difference, or the authority to influence. Blame is ultimately an abdication of responsibility.
The kind of person who consistently blames is someone who prefers weakness rather than strength, passivity rather than duty, and relishing in the drama of problems than the ethic of pursuing solutions. In other words, this is someone who is not wise, but rather quite foolish.